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DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD75312(A), 75316(A)
4-BIT SINGLE-CHIP MICROCOMPUTER
DESCRIPTION
The
µ
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
µ
s minimum instruction execution time for the CPU, the
µ
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.
µ
PD75308 User's Manual: IEM-5016
FEATURES
•
Higher reliability than
µ
PD75316
•
Internal memory
• Program memory (ROM)
: 16256
×
8 bits (
µ
PD75316(A))
: 12160
×
8 bits (
µ
PD75312(A))
• Data memory
: 512
×
4 bits
•
Capable of high-speed operation and variable instruction execution time to power save
• 0.95
µ
s, 1.91
µ
s, 15.3
µ
s (operating at 4.19 MHz)
• 122
µ
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
µ
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
µ
PD7514 (
µ
PD7500 Series)
•
PROM version (
µ
PD75P316,
µ
PD75P316A) available
APPLICATIONS
Suitable for controlling automotive and transportation equipment.
The
µ
PD75316(A) is treated as the representative model throughout this document,
unless there are differences between
µ
PD75312(A) and
µ
PD75316(A) functions.
The information in this document is subject to change without notice.
Document No. IC-2825A
(O. D. No. IC-8270A)
Date Published December 1993 P
Printed in Japan
The mark
5
shows major revised points.
©
NEC Corporation 1991
µ
PD75312(A), 75316(A)
FUNCTIONAL OUTLINE (1/2)
Item
Number of Basic
Instructions
Instruction Cycle
Internal
Memory
ROM
RAM
41
• 0.95
µ
s, 1.91
µ
s, 15.3
µ
s (Main system clock: operating at 4.19 MHz)
• 122
µ
s (Subsystem clock: operating at 32.768 kHz)
16256
×
8-bit (
µ
PD75316(A)), 12160
×
8-bit (
µ
PD75312(A))
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)
•
•
•
•
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
8
16
8
8
CMOS input pins
CMOS input/output pins
CMOS output pins
N-ch open-drain input/output
Also serve as segment pins
Withstand voltage: 10 V
Pull-up by mask option is possible.
:8
Pull-up by software is possible.
: 23
Function
General-Purpose
Registers
Accumulator
Instruction Set
I/O Line
40
LCD Controller/
Driver
• Segment number selection: 24/28/32 segments
(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
Range
Timer
V
DD
= 2.7 to 6.0 V
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)
3
Analog electronics
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