DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD75104A, 75108A
4-BIT SINGLE-CHIP MICROCOMPUTER
DESCRIPTION
µ
PD75108A is a 4-bit single-chip CMOS microcomputer having a data processing capability comparable to
that of an 8-bit microcomputer. Operating at high speeds, the microcomputer allows data to be manipulated
in units of 1, 4, or 8 bits. In addition, various bit manipulation instructions are provided to reinforce I/O
manipulation capability. Equipped with I/Os for interfacing with peripheral circuits operating on a different
supply voltage, outputs that can directly drive LEDs, and analog inputs,
µ
PD75108A is suitable for controlling
such small equipments as cameras and VCRs.
Detailed functions are described in the following user’s manual. Be sure to read it for designing.
µ
PD751XX Series User’s Manual: IEM-922
FEATURES
•
Internal memory
• Program memory (ROM)
: 8064
×
8 bits (
µ
PD75108A)
: 4096
×
8 bits (
µ
PD75104A)
• Data memory (RAM)
: 512
×
4 bits (
µ
PD75108A)
: 320
×
4 bits (
µ
PD75104A)
•
Architecture “75X” rivaling 8-bit microcomputers
•
43 systematically organized instructions
• A wealth of bit manipulation instructions
• 8-bit data transfer, compare, operation, increment, and decrement instructions
• 1-byte relative branch instructions
• GETI instruction executing 2-/3-byte instruction with one byte
•
High speed. Minimum instruction execution time: 0.95
µ
s (at 4.19 MHz, 5V)
•
Instruction execution time change function: 0.95
µ
s/1.91
µ
s/15.3
µ
s (at 4.19 MHz)
•
I/O port pins as many as 58
•
Three channels of 8-bit timers
•
8-bit serial interface
•
Multiplexed vector interrupt function
Unless there are differences among
µ
PD75104A and 75108A functions,
µ
PD75108A is treated as the
representative model throughout this manual.
The information in this document is subject to change without notice.
Document No. IC-2568A
(O. D. No. IC-7080B)
Date Published January 1994 P
Printed in Japan
The mark
5
shows major revised points.
©
NEC Corporation 1989
µ
PD75104A, 75108A
ORDERING INFORMATION
Part Number
Package
64-pin plastic QFP (
64-pin plastic QFP (
14 mm)
14 mm)
Quality Grade
Standard
Standard
µ
PD75104AGC-xxx-AB8
µ
PD75108AGC-xxx-AB8
Remarks:
xxx is ROM code number.
Please refer to “Quality Grade on NEC Semiconductor Devices” (Document Number IEI-1209) published by
NEC Corporation to know the specification of quality grade on the devices and its recommended applications.
2
µ
PD75104A, 75108A
FUNCTIONAL OUTLINE
Item
Number of Basic Instructions
Minimum Instruction
Execution Time
ROM
Internal Memory
RAM
General-Purpose Register
Accumulator
8064
×
8 bits (
µ
PD75108A), 4096
×
8 bits (
µ
PD75104A)
512
×
4 bits (
µ
PD75108A), 320
×
4 bits (
µ
PD75104A)
(4 bits
×
8
) ×
4 banks or (8 bis x 4 ) x 4 banks
Three accumulators selectable according to the bit length of manipulated data:
• 1-bit accumulator (CY), 4-bit accumulator (A), and 8-bit accumulator (XA)
58 port pins
• CMOS input pins (Pull-up resistor can be conneced to 4 out of 10 pins
in bit units.): 10
• CMOS I/O pins (can directly drive LEDs. Pull-up resistors can be connected to
24 out of 32 pins in bit units.): 32
• Medium voltage N-ch open-drain I/O pins: 12
(can directly drive LEDs. Pull-up resistors can be connected in bit units.)
• Comparator input pins (4-bit accuracy): 4
Timer/Counter
• 8-bit timer/event counter
×
2
• 8-bit basic interval timer (can be used as watchdog timer)
• 8 bits
• LSB first/MSB first mode selectable
• Two transfer modes (transfer/reception and reception only modes)
Vector Interrupt
Test Input
Standby
External: 3, Internal: 4
External: 2
• STOP and HALT modes
• Various bit manipulation instructions (set, reset, test, Boolean operation)
Instruction Set
• 8-bit data transfer, compare, operation, increment, and decrement
• 1-byte relative branch instructions
• GETI instruction constituting 2 or 3-byte instruction with 1 byte
Others
Package
• Power-ON reset circuit (mask option)
• Bit manipulation memory (bit sequential buffer: 16 bits)
• 64-pin plastic QFP (
14 mm)
43
Changeable in three steps: 0.95
µ
s, 1.91
µ
s, and 15.3
µ
s at 4.19 MHz
Specifications
I/O Port
Serial Interface
3
µ
PD75104A, 75108A
CONTENTS
1.
PIN CONFIGURATION (TOP VIEW)
...............................................................................................
6
2.
BLOCK DIAGRAM
...........................................................................................................................
7
3.
PIN FUNCTIONS
..............................................................................................................................
3.1
3.2
3.3
3.4
3.5
PORT PINS .............................................................................................................................................
PINS OTHER THAN PORTS .................................................................................................................
PIN INPUT/OUTPUT CIRCUITS ...........................................................................................................
RECOMMENDED PROCESSING OF UNUSED PINS ..........................................................................
NOTES ON USING THE P00/INT4, AND RESET PINS ......................................................................
8
8
9
10
12
13
4.
MEMORY CONFIGURATION
..........................................................................................................
14
5.
PERIPHERAL HARDWARE FUNCTIONS
........................................................................................
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
PORTS ....................................................................................................................................................
CLOCK GENERATOR CIRCUIT ............................................................................................................
CLOCK OUTPUT CIRCUIT ....................................................................................................................
BASIC INTERVAL TIMER .....................................................................................................................
TIMER/EVENT COUNTER .....................................................................................................................
SERIAL INTERFACE ..............................................................................................................................
PROGRAMMABLE THRESHOLD PORT (ANALOG INPUT PORT) ....................................................
BIT SEQUENTIAL BUFFER .... 16 BITS ...............................................................................................
POWER-ON FLAG (MASK OPTION) ....................................................................................................
19
19
20
21
22
22
24
26
27
27
6.
INTERRUPT FUNCTIONS
................................................................................................................
27
7.
STANDBY FUNCTIONS
..................................................................................................................
29
8.
RESET FUNCTION
...........................................................................................................................
30
9.
INSTRUCTION SET
.........................................................................................................................
33
10. APPLICATION EXAMPLES
..............................................................................................................
10.1
VCR CAMERA ........................................................................................................................................
42
42
11. MASK OPTION SELECTION
...........................................................................................................
43
4
µ
PD75104A, 75108A
12. ELECTRICAL SPECIFICATIONS
......................................................................................................
44
13. CHARACTERISTIC DATA (REFERENCE VALUE)
..........................................................................
54
14. PACKAGE DRAWINGS
...................................................................................................................
59
15. RECOMMENDED SOLDERING CONDITIONS
...............................................................................
60
APPENDIX A. FUNCTIONAL DIFFERENCES AMONG THIS SERIES PRODUCTS ........................
61
APPENDIX B. DEVELOPMENT TOOLS
..............................................................................................
62
APPENDIX C. RELATED DOCUMENTS
..............................................................................................
63
5
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