UPI-C42/UPI-L42
UNIVERSAL PERIPHERAL INTERFACE
CHMOS 8-BIT SLAVE MICROCONTROLLER
Y
Y
Y
Pin, Software and Architecturally
One 8-Bit Status and Two Data
Registers for Asynchronous Slave-to-
Master Interface
Compatible with all UPI-41 and UPI-42
Products
Y
Y
Low Voltage Operation with the UPI-
L42
Ð Full 3.3V Support
Fully Compatible with all Intel and Most
Other Microprocessor Families
Interchangeable ROM and OTP EPROM
Versions
Y
Y
Y
Y
Hardware A20 Gate Support
Y
Y
Y
Y
Suspend Power Down Mode
Expandable I/O
Security Bit Code Protection Support
Sync Mode Available
8-Bit CPU plus ROM/OTP EPROM, RAM,
I/O, Timer/Counter and Clock in a
Single Package
Over 90 Instructions: 70% Single Byte
Quick Pulse Programming Algorithm
Ð Fast OTP Programming
Y
Y
4096 x 8 ROM/OTP, 256 x 8 RAM 8-Bit
Timer/Counter, 18 Programmable I/O
Pins
Y
Available in 40-Lead Plastic, 44-Lead
Plastic Leaded Chip Carrier, and
44-Lead Quad Flat Pack Packages
Ý
(See Packaging Spec., Order 240800, Package Type P, N,
and S)
DMA, Interrupt, or Polled Operation
Supported
The UPI-C42 is an enhanced CHMOS version of the industry standard Intel UPI-42 family. It is fabricated on
Intel’s CHMOS III-E process. The UPI-C42 is pin, software, and architecturally compatible with the NMOS UPI
family. The UPI-C42 has all of the same features of the NMOS family plus a larger user programmable memory
array (4K), hardware A20 gate support, and lower power consumption inherent to a CHMOS product.
The UPI-L42 offers the same functionality and socket compatibility as the UPI-C42 as well as providing low
voltage 3.3V operation.
The UPI-C42 is essentially a ‘‘slave’’ microcontroller, or a microcontroller with a slave interface included on the
chip. Interface registers are included to enable the UPI device to function as a slave peripheral controller in the
MCS Modules and iAPX family, as well as other 8-, 16-, and 32-bit systems.
To allow full user flexibility, the program memory is available in ROM and One-Time Programmable EPROM
(OTP).
290414–1
290414–3
Figure 1. DIP Pin
290414–2
Figure 3. QFP Pin Configuration
Configuration
Figure 2. PLCC Pin Configuration
*Other brands and names are the property of their respective owners.
Information in this document is provided in connection with Intel products. Intel assumes no liability whatsoever, including infringement of any patent or
copyright, for sale and use of Intel products except as provided in Intel’s Terms and Conditions of Sale for such products. Intel retains the right to make
changes to these specifications at any time, without notice. Microcomputer Products may have minor variations to this specification known as errata.
©
COPYRIGHT INTEL CORPORATION, 1996
December 1995
Order Number: 290414-003
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UPI-C42/UPI-L42
Table 1. Pin Description (Continued)
DIP
Pin
No.
PLCC
Pin
QFP
Pin
Symbol
Type
Name and Function
No.
No.
P
20
–P
27
21–24 24–27
39–42
I/O
PORT 2: 8-bit, PORT 2 quasi-bidirectional I/O lines. The lower 4 bits
(P –P ) interface directly to the 8243 I/O expander device and
20
35–38 39–42 11, 13–15
23
contain address and data information during PORT 4–7 access. P
21
can be programmed to provide hardware A20 gate support. The upper
4 bits (P –P ) can be programmed to provide interrupt Request and
24 27
DMA Handshake capability. Software control can configure P as
24
Output Buffer Full (OBF) interrupt, P as Input Buffer Full (IBF)
25
interrupt, P as DMA Request (DRQ), and P as DMA ACKnowledge
26 27
(DACK).
PROG
25
28
43
I/O
PROGRAM: Multifunction pin used as the program pulse input during
PROM programming.
During I/O expander access the PROG pin acts as an address/data
strobe to the 8243. This pin should be tied high if unused.
a
POWER: 5V main power supply pin.
V
V
40
26
44
29
17
1
CC
a
a
POWER: 5V during normal operation. 12.75V during programming
operation. Low power standby supply pin.
DD
V
SS
20
22
38
GROUND: Circuit ground potential.
290414–4
Figure 4. Block Diagram
3
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UPI-C42/UPI-L42
UPI-C42/L42 PRODUCT SELECTION GUIDE
UPI-C42: Low power CHMOS version of the UPI-42.
Device
Package
ROM
OTP
Comments
80C42
N, P S
4K
ROM Device
82C42PC
82C42PD
82C42PE
N, P, S
N, P, S
N, P, S
Phoenix MultiKey/42 firmware, PS/2 style mouse support
Phoenix MultiKey/42L firmware, KBC and SCC for portable apps.
Phoenix MultiKey/42G firmware, Energy Efficient KBC solution
87C42
N, P, S
4K
One Time Programmable Version
UPI-L42: The low voltage 3.3V version of the UPI-C42.
Device
Package
ROM
OTP
Comments
80L42
N, P S
4K
ROM Device
82L42PC
82L42PD
N, P, S
N, P, S
Phoenix MultiKey/42 firmware, PS/2 style mouse support
Phoenix MultiKey/42L firmware, KBC and SCC for portable apps.
87L42
N, P, S
4K
One Time Programmable Version
e
N
KBC
e
Key Board Control, SCC
e
Scan Code Control
e
44 lead PLCC, P
e
40 lead PDIP, S
e
44 lead QFP, D
40 lead CERDIP
The 82C42PC provides a low powered solution for
industry standard keyboard and PS/2 style mouse
control. The 82C42PD provides a cost effective
means for keyboard and scan code control for note-
book platforms. The 82C42PE allows a quick time to
market, low cost solution for energy efficient desk-
top designs.
THE INTEL 82C42
As shown in the UPI-C42 product matrix, the UPI-
C42 is offered as a pre-programmed 80C42 with var-
ious versions of MultiKey/42 keyboard controller
firmware developed by Phoenix Technologies Ltd.
4
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UPI-C42/UPI-L42
4. P and P are port pins or Buffer Flag pins
24
25
which can be used to interrupt a master proces-
sor. These pins default to port pins on Reset.
UPI-42 COMPATIBLE FEATURES
1. Two Data Bus Buffers, one for input and one for
output. This allows a much cleaner Master/Slave
protocol.
If the ‘‘EN FLAGS’’ instruction has been execut-
ed, P becomes the OBF (Output Buffer Full)
24
pin. A ‘‘1’’ written to P enables the OBF pin (the
24
pin outputs the OBF Status Bit). A ‘‘0’’ written to
P
24
disables the OBF pin (the pin remains low).
This pin can be used to indicate that valid data is
available from the UPI (in Output Data Bus Buff-
er).
If ‘‘EN FLAGS’’ has been executed, P be-
comes the IBF (Input Buffer Full) pin. A ‘‘1’’ writ-
25
ten to P enables the IBF pin (the pin outputs
25
the inverse of the IBF Status Bit. A ‘‘0’’ written to
P
25
disables the IBF pin (the pin remains low).
This pin can be used to indicate that the UPI is
ready for data.
290414–5
2. 8 Bits of Status
Data Bus Buffer Interrupt Capability
ST ST ST ST
5
F
F
0
IBF OBF
7
6
4
1
D
7
D
D
D
D
D
2
D
D
0
6
5
4
3
1
ST –ST are user definable status bits. These
4
7
bits are defined by the ‘‘MOV STS, A’’ single
byte, single cycle instruction. Bits 4–7 of the
acccumulator are moved to bits 4–7 of the status
register. Bits 0–3 of the status register are not
affected.
290414–7
MOV STS, A Op Code: 90H
1
0
0
1
0
0
0
0
EN FLAGS Op Code: 0F5H
D
7
D
0
1
1
1
1
0
1
0
1
D
D
0
3. RD and WR are edge triggered. IBF, OBF, F and
1
7
INT change internally after the trailing edge of RD
or WR.
5. P and P are port pins or DMA handshake
26
27
pins for use with a DMA controller. These pins
default to port pins on Reset.
During the time that the host CPU is reading the
status register, the UPI is prevented from updat-
ing this register or is ‘locked out.’
If the ‘‘EN DMA’’ instruction has been executed,
P
26
written to P causes a DMA request (DRQ is
becomes the DRQ (DMA Request) pin. A ‘‘1’’
26
activated). DRQ is deactivated by DACK RD,
DACK WR, or execution of the ‘‘EN DMA’’ in-
#
#
struction.
290414–6
DMA Handshake Capability
290414–8
5
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UPI-C42/UPI-L42
If ‘‘EN DMA’’ has been executed, P becomes
27
PROGRAM MEMORY BANK SWITCH
the DACK (DMA ACKnowledge) pin. This pin acts
as a chip select input for the Data Bus Buffer
registers during DMA transfers.
The switching of 2K program memory banks is ac-
complished by directly setting or resetting the most
significant bit of the program counter (bit 11); see
Figure 5. Bit 11 is not altered by normal increment-
ing of the program counter, but is loaded with the
contents of a special flip-flop each time a JMP or
CALL instruction is executed. This special flip-flop is
set by executing an SEL PMB1 instruction and reset
by SEL PMB0. Therefore, the SEL PMB instruction
may be executed at any time prior to the actual bank
switch which occurs during the next branch instruc-
tion encountered. Since all twelve bits of the pro-
gram counter, including bit 11, are stored in the
stack, when a Call is executed, the user may jump to
subroutines across the 2K boundary and the proper
PC will be restored upon return. However, the bank
switch flip-flop will not be altered on return.
EN DMA Op Code: 0E5H
1
1
1
0
0
1
0
1
D
7
D
0
6. When EA is enabled on the UPI, the program
counter is placed on Port 1 and the lower four
e
e
bits of Port 2 (MSB
P , LSB
23
P ). On the
10
UPI this information is multiplexed with PORT
DATA (see port timing diagrams at end of this
data sheet).
7. The UPI-C42 supports the Quick Pulse Program-
ming Algorithm, but can also be programmed
with the Intelligent Programming Algorithm. (See
the Programming Section.)
UPI-C42 FEATURES
Programmable Memory Size Increase
The user programmable memory on the UPI-C42 will
be increased from the 2K available in the NMOS
product by 2X to 4K. The larger user programmable
memory array will allow the user to develop more
complex peripheral control micro-code. P2.3 (port 2
bit 3) has been designated as the extra address pin
required to support the programming of the extra 2K
of user programmable memory.
290414–30
Figure 5. Program Counter
The new instruction SEL PMB1 (73h) allows for ac-
cess to the upper 2K bank (locations 2048–4095).
The additional memory is completely transparent to
users not wishing to take advantage of the extra
memory space. No new commands are required to
access the lower 2K bytes. The SEL PMB0 (63h)
has also been added to the UPI-C42 instruction set
to allow for switching between memory banks.
INTERRUPT ROUTINES
Interrupts always vector the program counter to lo-
cation 3 or 7 in the first 2K bank, and bit 11 of the
program counter is held at ‘‘0’’ during the interrupt
service routine. The end of the service routine is sig-
naled by the execution of an RETR instruction. Inter-
rupt service routines should therefore be contained
entirely in the lower 2K words of program memory.
The execution of a SEL PMB0 or SEL PMB1 instruc-
tion within an interrupt routine is not recommended
since it will not alter PC11 while in the routine, but
will change the internal flip-flop.
Extended Memory Program
Addressing (Beyond 2K)
For programs of 2K words or less, the UPI-C42 ad-
dresses program memory in the conventional man-
ner. Addresses beyond 2047 can be reached by ex-
ecuting a program memory bank switch instruction
(SEL PMB0, SEL PMB1) followed by a branch in-
struction (JMP or CALL). The bank switch feature
extends the range of branch instructions beyond
their normal 2K range and at the same time prevents
the user from inadvertently crossing the 2K boundary.
Hardware A20 Gate Support
This feature has been provided to enhance the per-
formance of the UPI-C42 when being used in a key-
board controller application. The UPI-C42 design
has included on chip logic to support a hardware
GATEA20 feature which eliminates the need to pro-
vide firmware to process A20 command sequences,
6
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UPI-C42/UPI-L42
thereby providing additional user programmable
memory space. This feature is enabled by the
A20EN instruction and remains enabled until the de-
vice is reset. It is important to note that the execu-
tion of the A20EN instruction redefines Port 2, bit 1
as a pure output pin with read only characteristics.
The state of this pin can be modified only through a
valid ‘‘D1’’ command sequence (see Table 1). Once
enabled, the A20 logic will process a ‘‘D1’’ com-
mand sequence (write to output port) by setting/re-
setting the A20 bit on port 2, bit 1 (P2.1) without
requiring service from the internal CPU. The host
can directly control the status of the A20 bit. At no
time during this host interface transaction will the
IBF flag in the status register be activated. Table 1
gives several possible GATEA20 command/data se-
quences and UPI-C42 responses.
SUSPEND
The execution of the suspend instruction (82h or
E2h) causes the UPI-C42 to enter the suspend
mode. In this mode of operation the oscillator is not
running and the internal CPU operation is stopped.
The UPI-C42 consumes 40 mA in the suspend
mode. This mode can only be exited by RESET.
s
e
CPU operation will begin from PC
UPI-C42 exits from the suspend power down mode.
000h when the
Suspend Mode Summary
Oscillator Not Running
#
CPU Operation Stopped
#
E
Ports Tristated with Weak ( 2–10 mA) Pull-Up
#
#
#
s
Micropower Mode (I
40 mA)
Table 1. D1 Command Sequences
CC
This mode is exited by RESET
A0 R/W DB Pins IBF A20
Comments
(1)
1
0
1
W
W
W
D1h
DFh
FFH
0
0
0
n
Set A20 Sequence
1
Only DB1 Is Processed
(2)
n
1
0
1
W
W
W
D1h
DDh
FFh
0
0
0
n
0
n
Clear A20 Sequence
1
1
0
1
W
W
W
W
D1h
D1h
DFh
FFh
0
0
0
0
n
n
1
n
Double Trigger Set
Sequence
1
1
0
W
W
W
D1h
0
1
1
n
n
n
Invalid Sequence
No Change in State
of A20 Bit
(3)
XXh
DDh
NOTES:
1. Indicates that P2.1 remains at the previous logic level.
2. Only FFh commands in a valid A20 sequence have no
effect on IBF. An FFh issued at any other time will activate
IBF.
3. Any command except D1.
The above sequences assume that the GATEA20
logic has been enabled via the A20EN instruction.
As noted, only the value on DB 1 (data bus, bit 1) is
processed. This bit will be directly passed through to
P2.1 (port 2, bit 1).
7
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UPI-C42/UPI-L42
Table 2 covers all suspend mode pin states. In addi-
tion to the suspend power down mode, the UPI-C42
will also support the NMOS power down mode as
outlined in Chapter 4 of the UPI-42AH users manual.
NEW UPI-C42 INSTRUCTIONS
The UPI-C42 will support several new instructions to
allow for the use of new C42 features. These in-
structions are not necessary to the user who does
not wish to take advantage of any new C42 function-
ality. The C42 will be completely compatible with all
current NMOS code/applications. In order to use
new features, however, some code modifications will
be necessary. All new instructions can easily be in-
serted into existing code by use of the ASM-48 mac-
ro facility as shown in the following example:
Table 2. Suspend Mode Pin States
Pins
Suspend
Ports 1 and 2
Outputs
Inputs
Tristate
Weak Pull-Up
Disabled
(1)
DBB
Macname MACRO
DB 63H
ENDM
Outputs
Inputs
Normal
Normal
System Control
Ý
Ý
CS , A0)
Disabled
Ý
,
(RD , WR
New Instructions
The following is a list of additions to the UPI-42 in-
struction set. These instructions apply only to the
UPI-C42. These instructions must be added to exist-
ing code in order to use any new functionality.
Ý
Reset
Enabled
Disabled
Crystal Osc.
(XTAL1, XTAL2)
Test 0, Test 1
Prog
Disabled
High
SEL PMB0 Select Program Memory Bank 0
OPCODE 0110 0011 (63h)
Sync
High
PC Bit 11 is set to zero on next JMP or CALL instruc-
tion. All references to program memory fall within
the range of 0–2047 (0–7FFh).
EA
Disabled,
No Pull-Up
Ý
SS
Disabled,
Weak Pull-Up
SEL PMB1 Select Program Memory Bank 1
k
I
40 mA
CC
OPCODE 0111 0011 (73h)
NOTES:
1. DBB outputs are Tristate unless CS and RD are ac-
PC Bit 11 is set to one on next JMP or CALL instruc-
tion. All references to program memory fall within
the range of 2048–4095 (800h–FFFh).
Ý
Ý
Ý
Ý
tive. DBB inputs are disabled unless CS and WR are
active.
2. A ‘‘disabled’’ input will not cause current to be drawn
regardless of input level (within the supply range).
3. Weak pull-ups have current capability of typically 5 mA.
ENA20 Enables Auto A20 hardware
OPCODE 0011 0011 (33h)
Enables on chip logic to support Hardware A20 Gate
feature. Will remain enabled until device is reset.
8
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UPI-C42/UPI-L42
This circuitry gives the host direct control of port 2
bit 1 (P2.1) without intervention by the internal CPU.
When this opcode is executed, P2.1 becomes a ded-
icated output pin. The status of this pin is read-able
but can only be altered through a valid ‘‘D1’’ com-
mand sequence (see Table 1).
Pin
XTAL 2
Reset
Test 0
EA
Function
Clock Input
Initialization and Address Latching
Selection of Program or Verify Mode
Activation of Program/Verify Signature
Row/Security Bit Modes
SUSPEND Invoke Suspend Power Down Mode
OPCODE 1000 0010 (82h) or 1110 0010
(E2h)
BUS
Address and Data Input
Data Output During Verify
Enables device to enter micro power mode. In this
mode the external oscillator is off, CPU operation is
stopped, and the Port pins are tristated. This mode
can only be exited via a RESET signal.
P
V
Address Input
20–23
Programming Power Supply
Program Pulse Input
DD
PROG
WARNING
An attempt to program a missocketed UPI-C42 will result in
severe damage to the part. An indication of a properly
socketed part is the appearance of the SYNC clock output.
The lack of this clock may be used to disable the program-
mer.
PROGRAMMING AND VERIFYING THE
UPI-C42
The UPI-C42 programming will differ from the NMOS
device in three ways. First, the C42 will have a 4K
user programmable array. The UPI-C42 will also be
programmed using the Intel Quick-Pulse Program-
ming Algorithm. Finally, port 2 bit three (P2.3) will be
used during program as the extra address pin re-
quired to program the upper 2K bank of additional
memory. None of these differences have any effect
on the full CHMOS to NMOS device compatibility.
The extra memory is fully transparent to the user
who does not need, or want, to use the extra memo-
ry space of the UPI-C42.
The Program/Verify sequence is:
1. Insert 87C42 in programming socket
e
e
e
0V, TEST 0
e
5V, clock applied or inter-
e
2. CS
A
5V, V
5V, V
e
5V, RESET
0V,
CC
DD
0
e
nal oscillator operating, BUS floating, PROG
5V.
e
3. TEST 0
0V (select program mode)
e
4. EA
12.75V (active program mode)
e
5. V
6. V
6.25V (programming supply)
12.75V (programming power)
CC
In brief, the programming process consists of: acti-
vating the program mode, applying an address,
latching the address, applying data, and applying a
programming pulse. Each word is programmed com-
pletely before moving on to the next and is followed
by a verification step. The following is a list of the
pins used for programming and a description of their
functions:
e
DD
7. Address applied to BUS and P
20–23
e
8. RESET
5V (latch address)
9. Data applied to BUS
e
10. PROG
0V
5V followed by one 100 ms pulse to
e
11. TEST 0
5V (verify mode)
12. Read and verify data on BUS
e
e
13. TEST 0
14. RESET
0V
0V and repeat from step 6
15. Programmer should be at conditions of step 1
when the 87C42 is removed from socket
Please follow the Quick-Pulse Programming flow
chart for proper programming procedure shown in
Figure 6.
9
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UPI-C42/UPI-L42
flow chart of the Quick-Pulse Programming Algo-
rithm is shown in Figure 6.
The entire sequence of program pulses and byte
e
verifications is performed at V
6.25V and
12.75V. When programming has been com-
pleted, all bytes should be compared to the original
CC
e
V
DD
e
e
data with V
V
DD
5V.
CC
A verify should be performed on the programmed
bits to ensure that they have been correctly pro-
e
e
grammed. The verify is performed with T0
e
5V,
5V,
e
e
0V, and CS
Ý
V
DD
A0
5V, EA
12.75V, SS
e
5V, PROG
e
Ý
5V.
In addition to the Quick-Pulse Programming Algo-
rithm, the UPI-C42 OPT is also compatible with In-
tel’s Int ligent Programming Algorithm which is used
e
to program the NMOS UPI-42AH OTP devices.
The entire sequence of program pulses and byte
e
12.75V. When the int ligent Programming
verifications is performed at V
6.25V and
CC
e
cycle has been completed, all bytes should be com-
V
DD
e
e
e
pared to the original data with V
5V.
5.0, V
DD
CC
Verify
A verify should be performed on the programmed
bits to determine that they have been correctly pro-
e
e
grammed. The verify is performed with T0
e
5V,
5V,
e
e
V
DD
A0
5V, EA
0V, and CS
12.75V, SS
e
5V, PROG
e
5V.
SECURITY BIT
The security bit is a single EPROM cell outside the
EPROM array. The user can program this bit with the
appropriate access code and the normal program-
ming procedure, to inhibit any external access to the
EPROM contents. Thus the user’s resident program
is protected. There is no direct external access to
this bit. However, the security byte in the signature
row has the same address and can be used to
check indirectly whether the security bit has been
programmed or not. The security bit has no effect on
the signature mode, so the security byte can always
be examined.
290414–14
Figure 6. Quick-Pulse Programming Algorithm
Quick-Pulse Programming Algorithm
As previously stated, the UPI-C42 will be pro-
grammed using the Quick-Pulse Programming Algo-
rithm, developed by Intel to substantially reduce the
thorughput time in production programming.
SECURITY BIT PROGRAMMING/
VERIFICATION
The Quick-Pulse Programming Algorithm uses initial
pulses of 100 ms followed by a byte verification to
determine when the address byte has been suc-
cessfully programmed. Up to 25 100 ms pulses per
byte are provided before a failure is recognized. A
Programming
a. Read the security byte of the signature mode.
Make sure it is 00H.
10
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UPI-C42/UPI-L42
b. Apply access code to appropriate inputs to put
the device into security mode.
and will be present in the ROM and OTP ver-
sions. Location 10H contains the manufacturer
code. For Intel, it is 89H. Location 11H contains
the device code.
c. Apply high voltage to EA and V
pins.
DD
d. Follow the programming procedure as per the
Quick-Pulse Programming Algorithm with known
data on the databus. Not only the security bit, but
also the security byte of the signature row is pro-
grammed.
The code is 43H and 42H for the 8042AH/80C42
and OTP 8742AH/87C42, respectively. The
code is 44H for any device with the security bit
set by Intel.
C. User signatureÐThe user signature memory is
implemented in the EPROM and consists of 2
bytes for the customer to program his own signa-
ture code (for identification purposes and quick
sorting of previously programmed materials).
e. Verify that the security byte of the signature
mode contains the same data as appeared on
e
the data bus. (If DB0–DB7
byte will contain FFH.)
high, the security
f. Read two consecutive known bytes from the
EPROM array and verify that the wrong data are
retrieved in at least one verification. If the
EPROM can still be read, the security bit may
have not been fully programmed though the se-
curity byte in the signature mode has.
D. Test signatureÐThis memory is used to store
testing information such as: test data, bin num-
ber, etc. (for use in quality and manufacturing
control).
E. Security byteÐThis byte is used to check
whether the security bit has been programmed
(see the security bit section).
Verification
F. UPI-C42 Intel SignatureÐApplies only to
CHMOS device. Location 20H contains the man-
ufacturer code and location 21H contains the de-
vice code. The Intel UPI-C42 manufacturer’s
code is 99H. The device ID’s are 82H for the
OTP version and 83H for the ROM version. The
device ID’s are the same for the UPI-L42.
Since the security bit address overlaps the address
of the security byte of the signature mode, it can be
used to check indirectly whether the security bit has
been programmed or not. Therefore, the security bit
verification is a mere read operation of the security
e
security bit unprogrammed). Note
byte of the signature row (0FFH
e
security bit pro-
grammed; 00H
The signature mode can be accessed by setting
e
that during the security bit programming, the reading
of the security byte does not necessarily indicate
that the security bit has been successfully pro-
grammed. Thus, it is recommended that two consec-
utive known bytes in the EPROM array be read and
the wrong data should be read at least once, be-
cause it is highly improbable that random data coin-
cides with the correct ones twice.
e
P10
0, P11–P17
1, and then following the pro-
gramming and/or verification procedures. The loca-
tion of the various address partitions are as shown in
Table 3.
SYNC MODE
The Sync Mode is provided to ease the design of
multiple controller circuits by allowing the designer
to force the device into known phase and state time.
The Sync Mode may also be utilized by automatic
test equipment (ATE) for quick, easy, and efficient
synchronizing between the tester and the DUT (de-
vice under test).
SIGNATURE MODE
The UPI-C42 has an additional 64 bytes of EPROM
available for Intel and user signatures and miscella-
neous purposes. The 64 bytes are partitioned as fol-
lows:
A. Test code/checksumÐThis can accommodate
up to 25 bytes of code for testing the internal
nodes that are not testable by executing from the
external memory. The test code/checksum is
present on ROMs, and OTPs.
Sync Mode is enabled when SS pin is raised to high
a
voltage level of
12 volts. To begin synchroniza-
tion, T0 is raised to 5 volts at least four clock cycles
after SS. T0 must be high for at least four X2 clock
cycles to fully reset the prescaler and time state
generators. T0 may then be brought down during
low state of X2. Two clock cycles later, with the ris-
ing edge of X2, the device enters into Time State 1,
Phase 1. SS is then brought down to 5 volts 4 clocks
later after T0. RESET is allowed to go high 5 tCY (75
clocks) later for normal execution of code.
B. Intel signatureÐThis allows the programmer to
read from the UPI-41AH/42AH/C42 the manu-
facturer of the device and the exact product
name. It facilitates automatic device identification
11
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UPI-C42/UPI-L42
Table 3. Signature Mode Table
Address
Device
Type
No. of
Bytes
Test Code/Checksum
0
16H
0FH
ROM/OTP
25
1EH
11H
13H
15H
Intel Signature
10H
12H
14H
ROM/OTP
OTP
2
2
User Signature
Test Signature
ROM/OTP
ROM/OTP
ROM/OTP
ROM/OTP
2
Security Byte
1FH or 3FH
2
UPI-C42 Intel Signature
User Defined UPI-C42 OTP EPROM Space
20H
22H
21H
3EH
2
30
ACCESS CODE
The following table summarizes the access codes required to invoke the Sync Mode, Signature Mode,
and the Security Bit, respectively. Also, the programming and verification modes are included for
comparison.
Access Code
Control Signals
Data Bus
Modes
Port 2
Port 1
T0 RST SS EA PROG
V
DD
V
CC
0
1
2
3
4
5
6
7
0
1
2
3
0
1
2
3
4
5
6 7
Programming
Mode
0
0
0
1
0
1
0
1
0
1
1
HV
1
V
V
V
DDH CC
Address
Data In
Addr
Addr
Addr
Addr
a
a
X
X
X
X X X
0
1
HV STB
V
DDH CC
Verification
Mode
1
HV
HV
0
1
1
X
V
V
CC
V
CC
V
CC
Address
Data Out
a
0
a
1
X
X
X
X X X
CC
CC
CC
1
V
V
Sync Mode
STB
High
HV
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
X
1
X
1
X X X
X X 1
Signature Prog
Mode
0
0
0
1
0
0
0
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
1
HV
1
V
V
V
DDH CC
Addr. (see Sig Mode Table)
Data In
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
HV STB
V
DDH CC
Verify
HV
HV
HV
1
1
1
V
V
Addr. (see Sig Mode Table)
Data Out
CC
CC
CC
CC
V
V
Security Prog
Bit/Byte
V
V
V
DDH CC
Address
HV STB
V
DDH CC
Data In
Verify
HV
HV
1
1
V
V
Address
CC
CC
CC
CC
V
V
Data Out
NOTE:
1. a
e
e
e
0 or 1; a
0 or 1. a must
0
a .
1
0
1
12
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UPI-C42/UPI-L42
SYNC MODE TIMING DIAGRAMS
290414–15
Minimum Specifications
SYNC Operation Time, t
e
e
3.5 XTAL 2 Clock cycles. Reset Time, t
4 t
.
CY
SYNC
RS
NOTE:
The rising and falling edges of T0 should occur during low state of XTAL 2 clock.
APPLICATIONS
290414–12
Figure 7. UPI-C42 Keyboard Controller
290414–9
Figure 8. 8088-UPI-C42 Interface
13
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UPI-C42/UPI-L42
APPLICATIONS (Continued)
290414–10
Figure 9. 8048H-UPI-C42 Interface
290414–11
Figure 10. UPI-C42-8243 Keyboard Scanner
290414–13
Figure 11. UPI-C42 80-Column Matrix Printer Interface
14
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UPI-C42/UPI-L42
ABSOLUTE MAXIMUM RATINGS*
NOTICE: This is a production data sheet. The specifi-
cations are subject to change without notice.
a
Ambient Temperature Under Bias ÀÀÀÀ0 C to 70 C
§
Storage Temperature ÀÀÀÀÀÀÀÀÀÀ 65 C to 150 C
§
§
*WARNING: Stressing the device beyond the ‘‘Absolute
Maximum Ratings’’ may cause permanent damage.
These are stress ratings only. Operation beyond the
‘‘Operating Conditions’’ is not recommended and ex-
tended exposure beyond the ‘‘Operating Conditions’’
may affect device reliability.
b
a
§
Voltage on Any Pin with
Respect to GroundÀÀÀÀÀÀÀÀÀÀÀÀÀÀ 0.5V to 7V
b
a
Power Dissipation ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ1.5 W
e
a
0 C to 70 C, V
e
e a
a
5V 10%; 3.3V 10% UPI-L42
g
g
DC CHARACTERISTICS T
V
DD
§
§
UPI-C42
A
CC
UPI-L42
Max
Symbol
Parameter
Units
Notes
Min Max Min
b
b
a
0.8
V
V
Input Low Voltage
0.5 0.8
0.3
V
V
All Pins
IL
a
Input High Voltage
(Except XTAL2, RESET)
2.0
V
2.0
V
V
0.3
IH
CC
CC
a
V
V
V
V
V
V
Input High Voltage
(XTAL2, RESET)
3.5
V
2.0
0.3
V
V
V
V
V
IH1
OL
CC
CC
e
e
Output Low Voltage (D –D )
0
0.45
0.45
0.45
0.45
0.45
0.45
I
I
2.0 mA UPI-C42
1.3 mA UPI-L42
7
OL
OL
e
e
Output Low Voltage
(P , P , Sync)
I
I
1.6 mA UPI-C42
1 mA UPI-L42
OL1
OL2
OH
OL
P
P
10 17 20 27
OL
e
e
Output Low Voltage (PROG)
I
I
1.0 mA UPI-C42
0.7 mA UPI-L42
OL
OL
e b
e b
Output High Voltage (D –D ) 2.4
0
2.4
2.4
I
I
400 mA UPI-C42
260 mA UPI-L42
7
OH
OH
e b
e b
Output High Voltage
(All Other Outputs)
2.4
I
I
50 mA UPI-C42
25 mA UPI-L42
OH1
OH
OH
s
s
g
g
g
g
I
I
I
Input Leakage Current
(T , T , RD, WR, CS, A , EA)
10
10
10
10
mA
mA
V
V
V
CC
IL
SS
SS
IN
0
1
0
s
s
a
Output Leakage Current
(D –D , High Z State)
V
0.45
V
V
CC
OFL
LI
OUT
0
7
b
b
b
b
175
Low Input Load Current
(P , P
50
250
35
mA Port Pins
e
P
10 17 20 27
P
)
Min V
Max V
2.4V
0.45V
IN
e
IN
s
b
b
40
I
I
I
Low Input Load Current
(RESET, SS)
40
mA
V
V
IL
LI1
HI
IN
e
Port Sink Current
(P
V
V
3.0V
5.0V
CC
5.0
2.5
mA
mA
e
P
10 17 20 27
, P
P
)
IH
V
Supply Current
DD
4
DD
15
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UPI-C42/UPI-L42
DC CHARACTERISTICS
e
a
0 C to 70 C, V
e
e a
a
5V 10%; 3.3V 10% UPI-L42 (Continued)
g
g
T
A
V
§
§
CC
DD
UPI-C42
Min Max
UPI-L42
Min Max
Symbol
Parameter
Units
Notes
a
I
I
Total Supply Current:
@
Active Mode 12.5 MHz
CC
DD
30
20
mA
Typical 14 mA UPI-C42,
9 mA UPI-L42
(1, 4)
Osc. Off
Suspend Mode
40
5
26
mA
I
I
Standby Power Down
Supply Current
3.5
mA
NMOS Compatible
Power Down Mode
DD
IH
e
Input Leakage Current
(P –P , P –P
100
100
mA
V
IN
V
CC
)
27
10
17 20
(1)
(1)
e
C
C
Input Capacitance
I/O Capacitance
10
20
10
20
pF
pF
T
25 C
§
25 C
§
IN
A
A
e
T
IO
NOTE:
1. Sampled, not 100% tested.
DC CHARACTERISTICSÐPROGRAMMING (UPI-C42 AND UPI-L42)
e
e
e
g
25 C 5 C, V
g
6.25V 0.25V, V
g
12.75V 0.25V
T
A
§
§
CC
DD
Symbol
Parameter
Min
12.5
4.75
2.0
Max
13
Units
(1)
V
V
V
V
V
V
V
V
Program Voltage High Level
Voltage Low Level
DDH
DDL
PH
DD
V
DD
5.25
5.5
V
V
V
PROG Program Voltage High Level
PROG Voltage Low Level
Input High Voltage for EA
EA Voltage Low Level
b
0.5
0.8
PL
(2)
V
12.0
13.0
5.25
50.0
1.0
EAH
EAL
b
0.5
V
I
I
V
DD
High Voltage Supply Current
mA
DD
EA
(4)
EA High Voltage Supply Current
mA
NOTES:
1. Voltages over 13V applied to pin V
will permanently damage the device.
DD
must be applied to EA before V
must be applied simultaneously or before V
2. V
3. V
and removed after V
.
EAH
DDH
DDL
and must be removed simultaneously or after V .
DD
CC
DD
4. Sampled, not 100% tested.
16
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UPI-C42/UPI-L42
AC CHARACTERISTICS
e
a
0 C to 70 C, V
e
e
e a
a
5V 10%; 3.3V 10% for the UPI-L42
g
g
T
A
0V, V
V
DD
§
§
SS
CC
NOTE:
All AC Characteristics apply to both the UPI-C42 and UPI-L42
DBB READ
Symbol
Parameter
Min
0
Max
Units
ns
t
CS, A Setup to RD
0
v
u
AR
t
CS, A Hold After RD
0
0
ns
RA
t
t
t
t
RD Pulse Width
160
ns
RR
AD
RD
DF
CS, A to Data Out Delay
0
130
130
85
ns
RD to Data Out Delay
v
RD to Data Float Delay
u
0
ns
ns
DBB WRITE
Symbol
Parameter
Min
0
Max
Units
ns
t
CS, A Setup to WR
0
v
u
AW
t
CS, A Hold After WR
0
0
ns
WA
t
t
t
WR Pulse Width
160
130
0
ns
WW
DW
WD
Data Setup to WR
ns
u
u
Data Hold After WR
ns
17
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UPI-C42/UPI-L42
AC CHARACTERISTICS
e
a
0 C to 70 C, V
e
e
e a
a
5V 10%; 3.3V 10% for the UPI-L42 (Continued)
g
g
T
A
0V, V
V
DD
§
§
SS
CC
CLOCK
Symbol
Parameter
Min
1.2
80
Max
9.20
613
Units
(1)
ms
t
t
t
t
t
t
UPI-C42/UPI-L42
Cycle Time
CY
UPI-C42/UPI-L42
Clock Period
ns
ns
ns
ns
ns
CYC
PWH
PWL
R
Clock High Time
Clock Low Time
Clock Rise Time
Clock Fall Time
30
30
10
10
F
NOTE:
1. t
e
15/f(XTAL)
CY
AC CHARACTERISTICS DMA
Symbol
Parameter
DACK to WR or RD
Min
Max
Units
ns
t
t
t
t
0
0
0
ACC
CAC
ACD
CRQ
RD or WR to DACK
ns
DACK to Data Valid
130
110
ns
(1)
ns
RD or WR to DRQ Cleared
NOTE:
1. C
e
150 pF.
L
AC CHARACTERISTICS PORT 2
(3)
f(t )
CY
Symbol
Parameter
Min
Max
Units
(1)
(2)
(1)
(2)
(1)
(2)
b
t
t
t
t
t
t
t
Port Control Setup Before Falling Edge of PROG
Port Control Hold After Falling Edge of PROG
PROG to Time P2 Input Must Be Valid
Input Data Hold Time
1/15 t
28
55
ns
ns
ns
ns
ns
ns
CP
PC
PR
PF
DP
PD
PP
CY
1/10 t
125
CY
b
8/15 t
16
650
150
CY
0
Output Data Setup Time
2/10 t
250
45
CY
b
80
Output Data Hold Time
1/10 t
CY
PROG Pulse Width
6/10 t
750
ns
CY
NOTES:
e
e
e
1. C
2. C
80 pF.
20 pF.
1.25 ms.
L
L
3. t
CY
18
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UPI-C42/UPI-L42
AC CHARACTERISTICSÐPROGRAMMING (UPI-C42 AND UPI-L42)
e
e
e a
e
g
25 C 5 C, V
g
6.25V 0.25V, V
g
5V 0.25V, V
g
12.75V 0.25V
T
A
§
§
CC
DDL
DDH
(87C42/87L42 ONLY)
Symbol
Parameter
Address Setup Time to RESET
Min
Max
Units
t
4t
u
u
AW
CY
t
Address Hold Time after RESET
4t
WA
CY
t
Data in Setup Time to PROG
4t
v
u
DW
CY
t
Data in Hold Time after PROG
4t
WD
CY
t
t
t
t
t
Initial Program Pulse Width
95
105
ms
PW
TW
WT
DO
WW
Test 0 Setup Time for Program Mode
Test 0 Hold Time after Program Mode
Test 0 to Data Out Delay
4t
4t
CY
CY
4t
CY
RESET Pulse Width to Latch Address
PROG Rise and Fall Times
4t
CY
t , t
r
0.5
2.5
4t
100
ms
ms
f
t
t
t
t
CPU Operation Cycle Time
3.75
CY
RESET Setup Time before EA
u
RE
CY
(1)
Overprogram Pulse Width
2.85
1t
78.75
ms
OPW
DE
EA High to V High
DD
CY
NOTES:
1. This variation is a function of the iteration counter value, X.
2. If TEST 0 is high, t can be triggered by RESET
.
u
DO
AC TESTING INPUT/OUTPUT WAVEFORM
AC TESTING LOAD CIRCUIT
INPUT/OUTPUT
290414–16
290414–17
19
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UPI-C42/UPI-L42
DRIVING FROM AN EXTERNAL SOURCE
290414–18
290414–19
Rise and Fall Times Should Not
Exceed 10 ns. Resistors to V
NOTE:
See XTAL1 Configuration Table.
CC
3.5V
e
are Needed to Ensure V
if TTL Circuitry is Used.
IH
LC OSCILLATOR MODE
CRYSTAL OSCILLATOR MODE
L
C
NOMINAL
1
e
f
45 H 20 pF 5.2 MHz
120 H 20 pF 3.2 MHz
2q LC
Ê
0
a
C
3Cpp
e
C
Ê
2
290414–21
C1 5 pF (STRAY 5 pF)
a
j
Pin-to-Pin Capacitance
Cpp
5–10 pF
C2 (CRYSTAL
STRAY) 8 pF
C3 20–30 pF INCLUDING STRAY
Crystal Series Resistance Should
be Less Than 30X at 12.5 MHz.
290414–20
Each C Should be Approximately 20 pF, including Stray Capacitance.
XTAL1 Configuration Table
XTAL1 Connection
2) 10 KX Resistor
to Ground
1) to Ground
3) Not Connected
Not recommended for CHMOS
designs. Causes approximately
16 mA of additional current flow
through the XTAL1 pin on UPI-
C42 and approximately 11 mA of
additional current through XTAL1
on the UPI-L42.
Recommended configuration for
designs which will use both
NMOS and CHMOS parts. This
configuration limits the additional
current through the XTAL1 pin to
approximately 1 mA, while
maintaining compatibility with the
NMOS device.
Low power configuration
recommended for CHMOS only
designs to provide lowest
possible power consumption.
This configuration will not work
with the NMOS device.
20
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UPI-C42/UPI-L42
WAVEFORMS
READ OPERATIONÐDATA BUS BUFFER REGISTER
290414–22
WRITE OPERATIONÐDATA BUS BUFFER REGISTER
290414–23
CLOCK TIMING
290414–24
21
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UPI-C42/UPI-L42
WAVEFORMS (Continued)
COMBINATION PROGRAM/VERIFY MODE
290414–25
NOTES:
1. A must be held low (0V) during program/verify modes.
0
2. For V , V , V , V , V
, and V
, please consult the D.C. Characteristics Table.
DDL
IH IH1 IL IL1 DDH
3. When programming the 87C42, a 0.1 mF capacitor is required across V
transients which can damage the device.
and ground to suppress spurious voltage
DD
VERIFY MODE
290414–26
NOTES:
1. PROG must float if EA is low.
e
2. PROG must float or
5V when EA is high.
e
e
3. P –P
10
4. P –P
24
5V or must float.
5V or must float.
17
27
5. A must be held low during programming/verify modes.
0
22
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UPI-C42/UPI-L42
WAVEFORMS (Continued)
DMA
290414–27
PORT 2
290414–28
PORT TIMING DURING EXTERNAL ACCESS (EA)
290414–29
On the Rising Edge of SYNC and EA is Enabled, Port Data is Valid and can be Strobed. On the Trailing Edge of Sync
the Program Counter Contents are Available.
23
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UPI-C42/UPI-L42
Table 4. UPI Instruction Set
Mnemonic
Description
Bytes Cycles
Mnemonic
Description
Bytes Cycles
ACCUMULATOR
DATA MOVES
ADD A, Rr
@
ADD A, Rr
Add register to A
Add data memory
to A
1
1
1
1
MOV A, Rr
@
MOV A, Rr
Move register to A
Move data memory
to A
1
1
1
1
Ý
ADD A, data
Ý
MOV A, data Move immediate to A
Add immediate to A
Add register to A
with carry
2
1
2
1
2
1
1
2
1
1
ADDC A, Rr
MOV Rr, A
@
MOV Rr, A
Move A to register
Move A to data
memory
@
ADDC A, Rr
Add data memory
to A with carry
1
2
1
2
Ý
MOV Rr, data Move immediate to
2
2
2
2
Ý
ADDC A, data Add immediate
register
@
MOV Rr,
to A with carry
Move immediate to
data memory
Move PSW to A
Move A to PSW
Exchange A and
register
Ý
data
ANL A, Rr
@
ANL, A Rr
AND register to A
AND data memory
to A
1
1
1
1
MOV A, PSW
MOV PSW, A
XCH A, Rr
1
1
1
1
1
1
Ý
ANL A, data
AND immediate to A
OR register to A
OR data memory
to A
2
1
1
2
1
1
ORL A, Rr
@
ORL, A, Rr
@
XCH A, Rr
Exchange A and
data memory
Exchange digit of A
and register
1
1
1
1
1
1
2
2
@
XCHD A, Rr
Ý
ORL A, data
OR immediate to A
Exclusive OR regis-
ter to A
2
1
2
1
XRL A, Rr
@
MOVP A,
A
Move to A from
current page
@
XRL A, Rr
Exclusive OR data
memory to A
1
2
1
2
@
MOVP3, A,
A
Move to A from
page 3
Ý
XRL A, data
Exclusive OR imme-
diate to A
TIMER/COUNTER
INC A
DEC A
CLR A
CPL A
DA A
Increment A
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
MOV A, T
MOV T, A
STRT T
Read Timer/Counter
1
1
1
1
1
1
1
1
1
1
1
1
Decrement A
Clear A
Load Timer/Counter
Start Timer
Complement A
Decimal Adjust A
Swap nibbles of A
Rotate A left
STRT CNT
STOP TCNT
EN TCNTI
Start Counter
Stop Timer/Counter
Enable Timer/
SWAP A
RL A
Counter Interrupt
Disable Timer/
Counter Interrupt
RLC A
Rotate A left through
carry
DIS TCNTI
1
1
RR A
Rotate A right
Rotate A right
through carry
1
1
1
1
CONTROL
*EN A20
EN DMA
RRC A
Enable A20 Logic
Enable DMA Hand-
shake Lines
1
1
1
1
INPUT/OUTPUT
IN A, Pp
Input port to A
1
1
2
2
2
2
EN I
Enable IBF Interrupt
1
1
1
1
1
1
1
1
1
1
1
1
1
1
OUTL Pp, A
Ý
Output A to port
ANL Pp, data AND immediate to
port
DIS I
Diable IBF Inter-
rupt
Ý
ORL Pp, data OR immediate to
2
1
1
1
1
1
1
1
2
1
1
1
2
2
2
2
EN FLAGS
*SEL PMB0
*SEL PMB1
SEL RB0
SEL RB1
Enable Master
Interrupts
port
IN A, DBB
Input DBB to A,
clear IBF
Select Program
memory bank 0
Select Program
memory bank 1
Select register
bank 0
OUT DBB, A
MOV STS, A
MOVD A, Pp
MOVD Pp, A
ANLD Pp, A
ORLD Pp, A
Output A to DBB,
set OBF
A –A to Bits 4–7 of
4
Status
7
Input Expander
port to A
Select register
bank 1
Output A to
Expander port
AND A to Expander
port
* UPI-C42/UPI-L42 Only.
OR A to Expander
port
24
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UPI-C42/UPI-L42
Table 4. UPI Instruction Set (Continued)
Mnemonic
Description
Bytes Cycles
Mnemonic
Description
Bytes Cycles
CONTROL (Continued)
*SUSPEND Invoke Suspend Power-
down mode
BRANCH
1
1
2
1
JMP addr
@
Jump unconditional
Jump indirect
2
1
2
2
2
2
JMPP
A
NOP
No Operation
DJNZ Rr, addr Decrement register
and jump
REGISTERS
e
e
JC addr
Jump on Carry
Jump on Carry
1
0
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
INC Rr
@
INC Rr
Increment register
Increment data
memory
1
1
1
1
JNC addr
JZ addr
Jump on A Zero
Jump on A not Zero
JNZ addr
JT0 addr
JNT0 addr
JT1 addr
JNT1 addr
JF0 addr
JF1 addr
JTF addr
DEC Rr
Decrement register
1
1
e
e
e
e
Jump on T0
Jump on T0
Jump on T1
Jump on T1
1
0
1
0
SUBROUTINE
CALL addr
RET
Jump to subroutine
Return
2
1
1
2
2
2
RETR
Return and restore
status
e
e
Jump on F0 Flag
Jump on F1 Flag
1
1
FLAGS
CLR C
Jump on Timer Flag
e
Clear Carry
1
1
1
1
1
1
1
1
1
1
1
1
1, Clear Flag
Jump on IBF Flag
CPL C
Complement Carry
Clear Flag 0
JNIBF addr
JOBF addr
JBb addr
2
2
2
2
2
2
e
Jump on OBF Flag
CLR F0
CPL F0
CLR F1
CPL F1
0
Complement Flag 0
Clear F1 Flag
e
1
Complement F1 Flag
Jump on Accumula-
for Bit
*UPI-C42/UPI-L42 Only.
REVISION SUMMARY
The following has been changed since Revision
-003:
1. Delete all references to standby power down
mode.
The following has been changed since Revision
-002:
1. Added information on keyboard controller prod-
uct family.
2. Added I specification for the UPI-L42.
HI
The following has been changed since Revision
-001:
1. Added UPI-L42 references and specification.
25
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