DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD75402A(A)
4 BIT SINGLE-CHIP MICROCOMPUTER
The
µ
PD75402A(A) is a CMOS single-chip microcomputer which uses the 75X series architecture. It operates
at high speed with a minimum instruction execution time of 0.95
µ
s.
The
µ
PD75P402 is also available for system development evaluation. It contains one-time PROM instead
of mask ROM used in the
µ
PD75402A(A).
The following user's manual describes the details of the functions of the
µ
PD75402A(A). Be sure to read
it before designing an application system.
µ
PD75402A User's Manual: IEU-644
FEATURES
•
More reliable than the
µ
PD75402A
•
High-speed operation with a minimum instruction execution time of 0.95
µ
s (when the microcomputer
operates at 4.19 MHz)
•
Low voltage and low-speed instruction execution time of 15.3
µ
s (when the microcomputer operates at
4.19 MHz)
•
•
•
•
Memory mapping by on-chip peripheral hardware
NEC standard serial bus interface (SBI)
8-bit basic interval timer (watchdog timer applicable)
Interrupt function
•
•
Three vectored interrupts (one external and two internal interrupts)
One external test input
•
Clock output function (remote controller output applicable)
•
Capable of specifying the incorporation of 16 pull-up resistors by software
APPLICATIONS
Electronic units for automobiles, and suchlike
ORDERING INFORMATION
Part number
Package
28-pin plastic DIP (600 mil)
28-pin plastic shrink DIP (400 mil)
44-pin plastic QFP (10
×
10 mm)
Quality grade
Special
Special
Special
µ
PD75402AC(A)-×××
µ
PD75402ACT(A)-×××
µ
PD75402AGB(A)-×××-3B4
Remark
×××
indicates the ROM code number.
Please refer to
"Quality
Grades 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.
The information in this document is subject to change without notice.
Document No. IC-2841B
(O.D.No. IC-8273B)
Date Published November 1993 P
Printed in Japan
Major changes in this revision are indicated by stars (
) in the margins.
1
©
NEC CORPORATION 1991
1990
©
µ
PD75402A(A)
DIFFERENCES BETWEEN THE
µ
PD75402A(A) AND
µ
PD75402A
Product
Item
Quality grade
µ
PD75402A(A)
Special
µ
PD75402A
Standard
FUNCTIONAL OVERVIEW
Item
Number of basic
instructions
Minimum instruction
execution time
Built-in
memory
General register
I/O line
ROM
RAM
37
0.95, 1.91, or 15.3
µ
s (when operating at 4.19 MHz)
Switchable among three speeds
Function
•
•
1920
×
8 bits
64
×
4 bits
4 bits
×
4 or 8 bits
×
2 (memory mapping)
•
•
•
•
•
•
•
CMOS input ports
: 6 lines
CMOS I/O ports
: 12 lines (8 lines can drive the LED directly.)
N-ch open-drain I/O ports : 4 lines (All lines can drive the LED directly.)
Capable of controlling the incorporation of 16 pull-up resistors by software
Capable of controlling the incorporation of 4 pull-up resistors by mask option
1.05 MHz, 524 kHz, or 65.5 kHz (when operating at 4.19 MHz)
Applicable to remote controller output
Pull-up resistor
Clock output
Timer/counter
Serial interface
8-bit basic interval timer (watchdog timer applicable)
•
•
8 bits
Two transfer modes (three-wire synchronous mode and SBI mode)
Vectored interrupt
Test input
Standby
Instruction set
One external and two internal interrupts
One external input (See
Chapter 6
for details.)
STOP/HALT mode
•
•
•
•
Bit manipulation instructions (set, clear, test, and Boolean operation)
1-byte relative branch instructions
4-bit operation instructions (add, Boolean operation, and compare)
4- and 8-bit transfer instructions
28-pin plastic DIP (600 mil)
28-pin plastic shrink DIP (400 mil)
44-pin plastic QFP (10
×
10 mm)
Package
•
•
•
2
µ
PD75402A(A)
CONTENTS
1.
2.
3.
PIN CONFIGURATION (TOP VIEW) ......................................................................................
BLOCK DIAGRAM ......................................................................................................................
PIN FUNCTIONS .......................................................................................................................
3.1
3.2
3.3
3.4
3.5
3.6
PORT PINS .....................................................................................................................................
NON-PORT PINS ...........................................................................................................................
PIN INPUT/OUTPUT CIRCUITS ..................................................................................................
SELECTION OF A MASK OPTION ...........................................................................................
HANDLING UNUSED PINS .........................................................................................................
NOTES ON USING THE P00 AND RESET PINS .................................................................
4
6
7
7
8
8
10
11
11
4.
5.
MEMORY CONFIGURATION ...................................................................................................
PERIPHERAL HARDWARE FUNCTIONS ................................................................................
5.1
5.2
5.3
5.4
5.5
PORTS ..............................................................................................................................................
CLOCK GENERATOR ....................................................................................................................
CLOCK OUTPUT CIRCUIT ...........................................................................................................
BASIC INTERVAL TIMER ............................................................................................................
SERIAL INTERFACE ......................................................................................................................
12
14
14
15
16
17
18
6.
7.
8.
9.
INTERRUPT FUNCTION ...........................................................................................................
STANDBY FUNCTION ..............................................................................................................
RESET FUNCTION ....................................................................................................................
INSTRUCTION SET ...................................................................................................................
20
22
23
25
29
38
42
43
44
45
5
10. ELECTRICAL CHARACTERISTICS ...........................................................................................
11. PACKAGE DIMENSIONS ..........................................................................................................
12. RECOMMENDED SOLDERING CONDITIONS .........................................................................
APPENDIX A DIFFERENCES BETWEEN THE
µ
PD75402A(A) AND
µ
PD75P402 ...................
APPENDIX B DEVELOPMENT TOOLS .........................................................................................
APPENDIX C RELATED DOCUMENTS ........................................................................................
3
µ
PD75402A(A)
1.
PIN CONFIGURATION (TOP VIEW)
28-pin plastic DIP (600 mil), 28-pin plastic shrink DIP (400 mil)
Note
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
DD
X1
X2
P12 /INT2
P10/INT0
P23
P22 /PCL
P21
P20
P63
P62
P61
P60
P33
RESET
P00
P01/SCK
P02/SO/SB0
P03/SI
P50
P51
P52
P53
P30
P31
P32
V
SS
µ
PD75402AC(A)/CT(A)-
×××
P00 - P03
P20 - P23
P30 - P33
P50 - P53
P60 - P63
: Port 0
: Port 2
: Port 3
: Port 5
: Port 6
SCK
SO/SB0
SI
PCL
INT0
INT2
RESET
V
DD
V
SS
NC
: Serial clock I/O
: Serial output/input-output
: Serial input
: Clock output
: External vectored interrupt input
: External test input
: Reset input
: Power supply
: Ground
: No connection
P10 and P12: Port 1
X1 and X2 : Oscillating pins
Note
When the
µ
PD75402A(A) shares the printed circuit board with the
µ
PD75P402, connect the NC pin
directly to the V
SS
pin.
4
µ
PD75402A(A)
44-pin plastic QFP (10
×
10 mm)
P02/SO/SB0
35
P03/SI
P53
P52
P51
P50
NC
NC
NC
NC
44 43 42
P30
P31
P32
NC
V
SS
NC
NC
P33
P60
P61
NC
1
2
3
4
5
6
7
8
9
10
11
12 13 14
41
40
39
38
37
36
34
33
32
31
30
29
NC
P01/SCK
P00
RESET
NC
Note
NC
NC
NC
V
DD
X1
X2
NC
µ
PD75402AGB(A)-
×××
-3B4
28
27
26
25
24
15
16
17
18
19
20
21
23
22
P10/INT0
Note
When the
µ
PD75402A(A) shares the printed circuit board with the
µ
PD75P402, connect the NC pin
(pin 30) directly to the V
SS
pin
.
P12/INT2
P22/PCL
P62
P63
P20
P21
P23
V
SS
NC
NC
5
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