DATA SHEET
µ
PD75304B,75306B,75308B
4-BIT SINGLE-CHIP MICROCOMPUTER
MOS INTEGRATED CIRCUIT
DESCRIPTION
The
µ
PD75308B is a 75X Series 4-bit single-chip microcomputer capable of the same data processing as an
8-bit microcomputer.
It is a low voltage operation version of the
µ
PD75308 with on-chip LCD controller/driver. Operation at an
ultra-low voltage of 2.0 V is possible. An ultra small-sized plastic QFP (12
×
12 mm) is also provided and it is
perfect for small-sized set that uses an LCD panel.
Functions, etc., are described in detail in the User's Manual. Please be sure to read this manual when
carrying out design work.
µ
PD75308 User's Manual: IEM-5016
FEATURES
•
Ultra-low-voltage operation possible: V
DD
= 2.0 to 6.0 V
• Can be driven by two 1.5 V manganese batteries.
•
On-chip memory
• Program memory (ROM) : 8064
×
8 bit (
µ
PD75308B)
: 6016
×
8 bit (
µ
PD75306B)
: 4096
×
8 bit (
µ
PD75304B)
• Data memory (RAM)
: 512
×
4 bit
•
Instruction execution time adjustment function convenient in high-speed operation and power saving
• 0.95
µ
s, 1.91
µ
s, 15.3
µ
s (4.19 MHz operation)
• 122
µ
s (32.768 kHz operation)
•
Built-in programmable LCD controller/driver
• LCD drive voltage: 2.0 V to V
DD
•
An ultra small-sized plastic QFP (12
×
12 mm) is provided.
• Suitable for small-sized set, such as a camera.
•
On-chip PROM products available
• On-chip one-time PROM products :
µ
PD75P308, 75P316A
• On-chip EPROM products
:
µ
PD75P308, 75P316B
APPLICATIONS
Remote control, integrated camera type VCR, camera, gas meter, etc.
Unless there are any particular functional differences, the
µ
PD75308B is described in this document as a
representative product.
The information in this document is subject to change without notice.
Document No. IC-2913C
(O. D. No. IC-8082D)
Date Published January 1994 P
Printed in Japan
The mark
5
shows major revised points.
© NEC Corporation 1991
µ
PD75304B,75306B,75308B
ORDERING INFORMATION
Ordering Code
Package
80-pin
80-pin
80-pin
80-pin
80-pin
80-pin
80-pin
80-pin
80-pin
plastic
plastic
plastic
plastic
plastic
plastic
plastic
plastic
plastic
QFP (s 14 mm)
s
QFP (14
×
20 mm)
TQFP(fine pitch)(s 12 mm)
s
QFP (s 14 mm)
s
QFP (14
×
20 mm)
TQFP(fine pitch)(s 12 mm))
s
QFP (s 14 mm)
s
QFP (14
×
20 mm)
TQFP(fine pitch)(s 12 mm)
s
Quality Grade
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
µ
PD75304BGC-×××-3B9
µ
PD75304BGF-×××-3B9
µ
PD75304BGK-×××-BE9
µ
PD75306BGC-×××-3B9
µ
PD75306BGF-×××-3B9
µ
PD75306BGK-×××-BE9
µ
PD75308BGC-×××-3B9
µ
PD75308BGF-×××-3B9
µ
PD75308BGK-×××-BE9
Remarks
×××
is the 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
PD75304B,75306B,75308B
FUNCTION OUTLINE (1/2)
Item
Number of basic instructions
41
Function
Instruction cycle
0.95
µ
s, 1.91
µ
s, 15.3
µ
s (main system clock: 4.19 MHz operation)
122
µ
s (subsystem clock: 32.768 kHz operation)
ROM
8064
×
8 bits (
µ
PD75308B), 6016× 8 bits (
µ
PD75306B), 4096× 8 bits (
µ
PD75304B)
512
×
4 bits
• 4-bit manipulation: 8 (B, C, D, E, H, L, X, A)
• 8-bit manipulation: 4 (BC, DE, HL, XA)
• Bit accumulator (CY)
• 4-bit accumulator (A)
• 8-bit accumulator (XA)
• Various bit manipulation instructions
• Efficient 4-bit data manipulation instructions
On-chip memory
RAM
General register
Accumulators
Instruction set
• 8-bit data transfer instructions
• GETI instruction that can implement arbitrary 2-byte/3-byte instructions with 1
byte
8
16
CMOS input
Pull-up by software possible : 23
CMOS input/output
CMOS output
N-ch open-drain
input/output
Used with segment pin
10 V withstand voltage, pull-up by mask option
possible : 8
40
8
I/O lines
8
• Number of segments selection: 24/28/32 segments (4/8 can be switched at bit
port output.)
LCD controller/driver
• Display mode selection: Static, 1/2 duty, 1/3 duty (1/2 bias), 1/3 duty (1/3 bias),
1/4 duty
• LCD drive division resistor can be incorporated by mask option
V
DD
= 2.0 to 6.0 V
• 8-bit timer/event counter
• Clock source: 4 stages
• Event count possible
Timer
3 channels
• 8-bit basic interval timer
• Standard clock generation: 1.95 ms, 7.82 ms, 31.3 ms, 250 ms
(4.19 MHz operation)
• Watchdog timer application possible
Supply voltage range
3
µ
PD75304B,75306B,75308B
FUNCTION OUTLINE (2/2)
Item
Function
• Watch timer
• 0.5 seconds time interval generation
• Count clock source: Main system clock and subsystem clock
switchable
• Fast watch mode (3.9 ms time interval generation)
• Buzzer output possible (2 kHz)
Timer
3 channels
8-bit serial interface
• Three modes application possible
• 3-wire serial I/O mode
• 2-wire serial I/O mode
• SBI mode
• LSB top/MSB top switchable
Special bit manipulation memory: 16 bits
• Perfect for remote control application
Timer/event counter output (PTO0): Arbitrary frequency square wave output
Bit sequential buffer
Clock output function
Clock output (PCL):
Φ
, 524, 262, 65.5 kHz (4.19 MHz operation)
Buzzer output (BUZ): 2 kHz (4.19 MHz or 32.768 kHz operation)
• External: 3
• Internal: 3
• External: 1
• Internal: 1
• Main system clock oscillation ceramic/crystal oscillation circuit: 4.194304 MHz
• Subsystem clock oscillation crystal oscillation circuit: 32.768 kHz
STOP/HALT mode
• 80-pin plastic QFP (14
×
20 mm)
• 80-pin plastic QFP (s 14 mm)
s
• 80-pin plastic TQFP (fine pitch) (s 12 mm)
s
Vectored interrupt
Test input
System clock oscillator
Standby
Package
4
µ
PD75304B,75306B,75308B
CONTENTS
1. PIN CONFIGURATION (TOP VIEW)...............................................................................................
2. BLOCK DIAGRAM............................................................................................................................
3. PIN FUNCTIONS ..............................................................................................................................
3.1
3.2
3.3
3.4
3.5
PORT PINS ..............................................................................................................................................
NON-PORT PINS .....................................................................................................................................
PIN INPUT/OUTPUT CIRCUITS ..............................................................................................................
RECOMMENDED CONNECTION OF UNUSED PINS .............................................................................
PRECAUTIONS CONCERNING P00/INT4 PIN AND RESET PIN ...........................................................
6
8
9
9
11
13
15
16
4.
5.
MEMORY CONFIGURATION ..........................................................................................................
PERIPHERAL HARDWARE FUNCTIONS ........................................................................................
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
PORTS .....................................................................................................................................................
CLOCK GENERATOR ...............................................................................................................................
CLOCK OUTPUT CIRCUIT .......................................................................................................................
BASIC INTERVAL TIMER ........................................................................................................................
WATCH TIMER ........................................................................................................................................
TIMER/EVENT COUNTER .......................................................................................................................
SERIAL INTERFACE .................................................................................................................................
LCD CONTROLLER/DRIVER ....................................................................................................................
BIT SEQUENTIAL BUFFER ......................................................................................................................
16
21
21
22
23
24
25
26
28
30
32
6.
7.
8.
9.
INTERRUPT FUNCTION .................................................................................................................
STANDBY FUNCTION ....................................................................................................................
RESET FUNCTION ..........................................................................................................................
INSTRUCTION SET .........................................................................................................................
32
34
35
37
10. MASK OPTION SELECTION ............................................................................................................ 45
11. ELECTRICAL SPECIFICATIONS ......................................................................................................
12. PACKAGE INFORMATION ..............................................................................................................
13. RECOMMENDED SOLDERING CONDITIONS ................................................................................
APPENDIX A. DIFFERENCES AMONG SERIES PRODUCTS ..............................................................
APPENDIX B. DEVELOPMENT TOOLS ...............................................................................................
APPENDIX C. RELATED DOCUMENTS ..............................................................................................
46
64
67
70
72
73
5
Embedded System
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