NEC Corporation 1991
Document No.
IC-2825A
(O. D. No.
IC-8270A)
Date Published December 1993 P
Printed in Japan
DATA SHEET
MOS INTEGRATED CIRCUIT
PD75312(A), 75316(A)
The information in this document is subject to change without notice.
The mark 5 shows major revised points.
DESCRIPTION
The
PD75316(A) is one of the 75X Series 4-bit single-chip microcomputer having a built-in LCD controller/
driver, and has a data processing capability comparable to that of an 8-bit microcomputer.
In addition to high-speed operation with 0.95
s minimum instruction execution time for the CPU, the
PD75316(A) can also process data in 1-, 4-, and 8-bit units. Therefore, as a 4-bit single-chip microcomputer
chip having a built-in LCD panel controller/driver, its data processing capability is the highest in its class in
the world.
Detailed functions are described in the following user's manual. Be sure to read it for designing.
PD75308 User's Manual: IEM-5016
FEATURES
Higher reliability than
PD75316
Internal memory
Program memory (ROM)
: 16256
8 bits (
PD75316(A))
: 12160
8 bits (
PD75312(A))
Data memory
: 512
4 bits
Capable of high-speed operation and variable instruction execution time to power save
0.95
s, 1.91
s, 15.3
s (operating at 4.19 MHz)
122
s (operating at 32.768 kHz)
75X architecture comparable to that for an 8-bit microcomputer is employed
Built-in programmable LCD controller/driver
Clock operation at reduced power dissipation: 5
A TYP. (operating at 3 V)
Enhanced timer function (3 channels)
Interrupt functions especially enhanced for applications, such as remote control receiver
Pull-up resistors can be provided for 31 I/O lines
Built-in NEC standard serial bus interface (SBI)
Upgraded model of
PD7514 (
PD7500 Series)
PROM version (
PD75P316,
PD75P316A) available
APPLICATIONS
Suitable for controlling automotive and transportation equipment.
The
PD75316(A) is treated as the representative model throughout this document,
unless there are differences between
PD75312(A) and
PD75316(A) functions.
4-BIT SINGLE-CHIP MICROCOMPUTER
PD75312(A), 75316(A)
2
ORDERING INFORMATION
Part Number
Package
Quality Grade
PD75312GF(A)-xxx-3B9
80-pin plastic QFP (14
20 mm)
Special
PD75316GF(A)-xxx-3B9
80-pin plastic QFP (14
20 mm)
Special
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.
DIFFERENCE BETWEEN
PD75316(A) and
PD75316
Product
PD75316(A)
PD75316
Item
Quality Grade
Special
Standard
Directly Driving LED
Not offered
Offered
Absolute Maximum Ratings
Differ in high-level output currrent and low-level output
current
DC Characteristics
Differ in low-level output voltage
Electrical
Characteristics
PD75312(A), 75316(A)
3
FUNCTIONAL OUTLINE (1/2)
Item
Function
Number of Basic
41
Instructions
Instruction Cycle
0.95
s, 1.91
s, 15.3
s (Main system clock: operating at 4.19 MHz)
122
s (Subsystem clock: operating at 32.768 kHz)
ROM
16256
8-bit (
PD75316(A)), 12160
8-bit (
PD75312(A))
RAM
512
4 bits
General-Purpose
4-bit manipulation: 8 (B, C, D, E, H, L, X, A)
Registers
8-bit manipulation: 4
(
BC, DE, HL, XA)
Accumulator
Bit accumulator (CY)
4-bit accumulator (A)
8-bit accumulator (XA)
Instruction Set
Abundant bit manipulation instructions
Efficient 4-bit data manipulation instructions
8-bit data transfer instructions
GETI instruction executing 2-/3-byte instruction with a single byte
I/O Line
40
8
CMOS input pins
Pull-up by software is possible.
: 23
16
CMOS input/output pins
8
CMOS output pins
Also serve as segment pins
8
N-ch open-drain input/output
Withstand voltage: 10 V
Pull-up by mask option is possible.
: 8
LCD Controller/
Segment number selection: 24/28/32 segments
Driver
(4/8 pins can also be used as bit ports.)
Display mode selection: Static, 1/2 duty, 1/3 duty (1/2 bias), 1/3 duty (1/3 bias), 1/4 duty
Dividing resistor for LCD driving can be built-in by mask option.
Supply Voltage
V
DD
= 2.7 to 6.0 V
Range
Internal
Memory
Timer
3 chs
8-bit timer/event counter
Clock source: 4 steps
Event count is possible
8-bit basic interval timer
Reference time generation: 1.95 ms, 7.82 ms, 31.3 ms, 250 ms
(operating at 4.19 MHz)
Can be used as watchdog timer
Watch timer
Generates 0.5-second time intervals
Count clock source: Main system clock or subsystem clock (selectable)
Watch fast forward mode (generates 3.9-ms time intervals)
Buzzer output (2 kHz)
PD75312(A), 75316(A)
4
FUNCTIONAL OUTLINE (2/2)
Item
Function
8-bit Serial Interface
Three modes:
3-line serial I/O mode
2-line serial I/O mode
SBI mode
LSB/MSB first selectable
Bit Sequential
Special bit manipulation memory: 16 bits
Buffer
Ideal for remote controller
Clock Output
Timer/event counter output (PTO0): Output of square wave at specified frequency
Function
Clock output (PCL):
,
524, 262, 65.5 kHz (operating at 4.19 MHz)
Buzzer output (BUZ): 2 kHz (operating at 4.19 MHz or 32.768 kHz)
Vector Interrupt
External: 3
Internal: 3
Test Input
External: 1
Internal: 1
System Clock
Ceramic/crystal oscillator circuit for main system clock oscillation: 4.194304 MHz
Oscillator Circuit
Crystal oscillator circuit for subsystem clock oscillation: 32.768 kHz
Standby
STOP/HALT mode
Package
80-pin plastic QFP (14
20 mm)
PD75312(A), 75316(A)
5
CONTENTS
1.
PIN CONFIGURATION (Top View) ................................................................................................
7
2.
BLOCK DIAGRAM ...........................................................................................................................
8
3.
PIN FUNCTIONS ..............................................................................................................................
9
3.1
PORT PINS .............................................................................................................................................
9
3.2
NON PORT PINS ...................................................................................................................................
11
3.3
PIN INPUT/OUTPUT CIRCUITS ...........................................................................................................
13
3.4
RECOMMENDED PROCESSING OF UNUSED PINS ..........................................................................
15
3.5
NOTES ON USING THE P00/INT4, AND RESET PINS ......................................................................
16
4.
MEMORY CONFIGURATION ..........................................................................................................
16
5.
PERIPHERAL HARDWARE FUNCTIONS ........................................................................................
20
5.1
PORTS ....................................................................................................................................................
20
5.2
CLOCK GENERATOR CIRCUIT ............................................................................................................
21
5.3
CLOCK OUTPUT CIRCUIT ....................................................................................................................
22
5.4
BASIC INTERVAL TIMER .....................................................................................................................
23
5.5
WATCH TIMER ......................................................................................................................................
24
5.6
TIMER/EVENT COUNTER .....................................................................................................................
25
5.7
SERIAL INTERFACE ..............................................................................................................................
27
5.8
LCD CONTROLLER/DRIVER ..................................................................................................................
29
5.9
BIT SEQUENTIAL BUFFER ...................................................................................................................
31
6.
INTERRUPT FUNCTIONS ................................................................................................................
31
7.
STANDBY FUNCTIONS ..................................................................................................................
33
8.
RESET FUNCTION ...........................................................................................................................
34
9.
INSTRUCTION SET .........................................................................................................................
36
10. SELECTION OF MASK OPTION .....................................................................................................
42
11. ELECTRICAL SPECIFICATIONS ......................................................................................................
43
12. PACKAGE DRAWINGS ...................................................................................................................
55
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