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USER'S MANUAL
μPD75402A
4-BIT SINGLE-CHIP MICROCOMPUTER
μPD75402A
μPD75P402
Document No. IEU1270C
(O. D. No. IEU-644D)
Date Published March 1994 P
© NEC Corporation 1989 Printed in Japan
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MS-DOS is a trademark of Microsoft Corporation. PC/AT, PC DOS are trademarks of IBM Corporation. The information in this document is subject to change without notice. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which may appear in this document. NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellectua
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Major Revisions in This Version Section Description Amendment: Fig. 5-52 “Data Transmission from Slave Device P.117 to Master Device” P.179 to 181 Change: Appendix B “Development Tools” The mark H shows main revised points.
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PREFACE USER This manual is intended for user engineers who wish to understand the μPD75402A’s, 75P402’s functions and design an application system using them. OBJECTIVE The objective of this manual is for the user to understand the μPD75402A’s, 75P402’s hardware functions shown below. COMPOSITION This manual is composed roughly of the following contents. • General description • Pin functions • Internal block functions • Interrupt • Other internal peripheral functions • Instruction functions REA
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Related Documentation Device Related Documents Document Name Document Number User's Manual IEU-644 Instruction Application Table IEM-5504 Application Note IEA-638 75X Series Selection Guide IF-151 Development Tool Related Documents Document Name Document Number IE-75000-R/IE-75001-R User's Manual EEU-846 IE-75000-R-EM User's Manual EEU-673 EP-75402C-R User's Manual EEU-701 EP-75402GB-R User's Manual EEU-702 PG-1500 User's Manual EEU-651 Operation RA75X Assembler Package l EEU-731 Language User's
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CONTENTS CHAPTER 1. GENERAL............................................................................................................................... 1 1.1 OUTLINE OF FUNCTIONS . .......................................................................................................................... 2 1.2 ORDERING INFORMATION AND QUALITY GRADE.................................................................................. 3 1.3 DIFFERENCES BETWEEN μPD75402A AND μPD75402, 75P402........
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CHAPTER 4. INTERNAL CPU FUNCTIONS ........................................................................................... 31 4.1 PROGRAM COUNTER (PC) ........................................................................................................................... 31 4.2 PROGRAM MEMORY (ROM) . ..................................................................................................................... 32 4.3 DATA MEMORY (RAM) .............................................
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6.5 MACHINE CYCLES BEFORE INTERRUPT SERVICING .............................................................................. 135 6.6 INTERRUPT APPLICATIONS ........................................................................................................................ 137 CHAPTER 7. STANDBY FUNCTION ....................................................................................................... 141 7.1 STANDBY MODE SETTING AND OPERATION STATES ..................................
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CONTENTS OF FIGURES Fig. No Title Page 3-1 Static RAM Address Updating Method ............................................................................................. 25 4-1 Program Counter Configuration ......................................................................................................... 31 4-2 Program Memory Map ........................................................................................................................ 32 4-3 Data Memory Map ...............
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Fig. No. Title Page 5-32 Example of SBI Serial Bus System Configuration ........................................................................... 93 5-33 SBI Transfer Timing ............................................................................................................................. 95 5-34 Bus Release Signal ............................................................................................................................... 96 5-35 Command Signal ....................
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CONTENTS OF TABLES Table No. Title Page 1-1 Differences Between μPD75402A and μPD75402, 75P402 ................................................................. 4 2-1 Port Pin List ........................................................................................................................................... 11 2-2 List of Pins Other than Port Pins ........................................................................................................ 12 2-3 Port 0’s, 1’s Dual-Functio
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CHAPTER 1. GENERAL CHAPTER 1. GENERAL The μPD75402A, 75P402 is a CMOS 4-bit single-chip microcomputer adopting the 75X architecture. With its built- in NEC standard serial bus interface (SBI), it is suitable as a slave microcomputer in a multiprocessor system configuration using the 75X, 78K series as the host microcomputer. The μPD75402A has shortened the conventional μPD75402’s minimum instruction execution time to 0.95 μs. The μPD75P402 is also capable of high-speed processing. It is poss
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CHAPTER 1. GENERAL 1.1 OUTLINE OF FUNCTIONS Item Description Number of basic 37 instructions Instruction • 0.95 μs, 1.91 μs, 15.3 μs (at 4.19 MHz operation) execution time selectable between 3 levels Built-in Program 1920 × 8 bits (μPD75402A: Mask ROM, μPD75P402: One-time PROM) memory memory Data 64 × 4 bits (RAM) memory General register 4 bits × 4, or 8 bits × 2 (memory mapping) Accumulators 3 accumulators to suit manipulation data length • Bit accumulator (CY), 4-bit accumulator (A), 8-bit a
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CHAPTER 1. GENERAL 1.2 ORDERING INFORMATION AND QUALITY GRADE (1) Ordering Information Ordering Code Package Program Memory μPD75402AC-××× 28-pin plastic DIP (600 mil) Mask ROM μPD75402ACT-××× 28-pin plastic shrink DIP (400 mil) μPD75402AGB-×××-3B4 44-pin plastic QFP ( n n 10mm) μPD75P402C 28-pin plastic DIP (600 mil) One-time PROM μPD75P402CT 28-pin plastic shrink DIP (400 mil) μPD75P402GB-3B4 44-pin plastic QFP ( n n 10mm) ×××: ROM code number (2) Quality Grade Standard Please refer to “Qual
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CHAPTER 1. GENERAL 1.3 DIFFERENCES BETWEEN μPD75402A AND μPD75402, 75P402 Table 1-1 shows the differences between the μPD75402A and the μPD75402, 75P402. Otherwise the μPD75402A and the μPD75402, 75P402 have the same functions and are pin-compatible. Table 1-1 Differences Between μPD75402A and μPD75402, 75P402 Item μPD75402A μPD75402 μPD75P402 ROM configuration Mask ROM One-time PROM Instruction 0.95, 1.91, 15.3 μs 1.91, 15.3 μs* 0.95, 1.91, 15.3 μs execution time (at 4.19 MHz operation) (at 4
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CHAPTER 1. GENERAL 1.4 BLOCK DIAGRAM
5 PORT0
4
P00-P03
BASIC
PROGRAM
ALU
CY
SP (5)
INTERVAL
COUNTER(11)
TIMER
PORT1
2
P10, P12
INTBT
PORT2
4
P20-P23
SI
SERIAL
ROM (PROM)
SO/SB0
INTERFACE
4
PORT3
P30-P33
PROGRAM
GENERAL REG.
SCK
MEMORY
DECODE
INTCSI
AND
PORT5
4
P50-P53
CONTROL
RAM
DATA MEMORY
64 x 4 bits
1920 × 8 bits
4
PORT6
P60-P63
INT0
INTERRUPT
CONTROL
INT2
N
fxx/2
CPU CLOCK
CLOCK
ø
CLOCK
CLOCK
STAND BY
OUTPUT
DIVIDER
GENER
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μPD75402AC/CT-××× μPD75P402C/CT-CT CHAPTER 1. GENERAL 1.5 PIN CONFIGURATION 1.5.1 28-Pin Plastic Dip (600 mil), Shrink Dip (400 mil) (1) Normal operating mode *
VDD
(VPP) NC
1
28
X1
RESET
2
27
X2
P00
3
26
P12/INT2
P01/SCK
4
25
P10/INT0
5
P02/SO/SB0
24
P23
P03/SI
6
23
P22/PCL
P50
7
22
P21
P51
8
21
P20
9
P52
20
P63
P53
10
19
P62
11
P30
18
P61
12
P31
17
P60
P32
13
16
P33
14
15
VSS
P00 to P03 : Port 0 SCK : Serial clock input/output P10, P12
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μPD75P402C/CT CHAPTER 1. GENERAL (2) PROM mode 1
VPP
28
VDD
2
A12
27
A14
3
A7
26
A13
4
25
A8
A6
A5
5
24
A9
6
A4
23
A11
7
22
OE
A3
8
A10
A2
21
9
20
CE
A1
10
A0
19
O7
11
O0
18
O6
12
O1
17
O5
O2
13
16
O4
14
VSS
15
O3
A0 to A14 : Address input O0 to O7 : Data input/output CE : Chip enable input OE : Output enable input VDD : Power supply VPP : Program power supply VSS : Ground 7
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CHAPTER 1. GENERAL 1.5.2 44-Pin Plastic QFP ( nn 10mm) (1) Normal operating mode 44
43
42
41
40
39
38
37
36
35
34
1
P30
P01/SCK
33
2
P31
P00
32
3
P32
31
RESET
NC
4
30
NC (VPP)*
VSS
5
NC
29
μPD75402AGB-×××-3B4 NC
6
NC
28
μPD75P402GB-×××-3B4 NC
7
NC
27
8
P33
26
VDD
P60
9
25
X1
10
P61
24
X2
NC
11
23
NC
12
13
14
15
16
17
18
19
20
21
22
Remarks Parentheses for the μPD75P402. * If using the μPD75P402 and the printed circuit board com
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CHAPTER 1. GENERAL (2) PROM mode 44
43
42
41
40
39
38
37
35
34
36
A6
O0
1
33
2
O1
A7
32
O2
3
A12
31
4
30
VPP
NC
VSS
5
NC
29
6
NC
μPD75P402GB-3B4 28
NC
7
NC
NC
27
VDD
O3
8
26
A14
O4
9
25
O5
10
24
A13
11
23
NC
NC
12
13
14
15
16
17
18
19
20
21
22
9 O6
A0
O7
A1
CE
A2
A10
NC
NC
NC
VSS
NC
NC
NC
OE
A3
A11
A4
A9
A5
A8
NC
