UPD784020 Datasheet, PDF (1/90 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCOMPUTER

DATA SHEET
MOS INTEGRATED CIRCUIT
mPD784020, 784021
16/8-BIT SINGLE-CHIP MICROCOMPUTER
The mPD784021 is a product of the mPD784026 sub-series in the 78K/IV series. It contains various peripheral
hardware such as RAM, I/O ports, 8-bit resolution A/D and D/A converters, timers, serial interface, and interrupt
functions, as well as a high-speed, high-performance CPU.
The mPD784021 is a ROM-less product of the mPD784025 or mPD784026.
The mPD784020 differs from the mPD784021 only in its RAM size: 512 bytes are allocated for the mPD784020,
while 2048 bytes are allocated for the mPD784021.
For specific functions and other detailed information, consult the following user’s manual.
This manual is required reading for design work.
mPD784026 Sub-Series User’s Manual, Hardware : U10898E
78K/IV Series User’s Manual, Instruction
: U10905E
FEATURES
• 78K/IV series
• Pin-compatible with the mPD78234 sub-series
• Minimum instruction execution time: 160 ns
(at 25 MHz)
• Number of I/O ports: 46
• Timer/counters: 16-bit timer/counter ¥ 3 units
16-bit timer ¥ 1 unit
• Serial interface: 3 channels
UART/IOE (3-wire serial I/O) :2 channels
CSI (3-wire serial I/O, SBI) : 1 channel
• PWM outputs: 2
• Standby function
HALT/STOP/IDLE mode
• Clock frequency division function
• Watchdog timer : 1 channel
• A/D converter : 8-bit resolution ¥ 8 channels
• D/A converter : 8-bit resolution ¥ 2 channels
• Supply voltage : VDD = 2.7 to 5.5 V
APPLICATIONS
LBP, automatic-focusing camera, PPC, printer, electronic typewriter, air conditioner, electronic musical instru-
ments, cellular telephone, etc.
This manual describes the mPD784021 unless otherwise specified.
The information in this document is subject to change without notice.
Document No. U11514EJ1V0DS00 (1st edition)
The mark H shows major revised points.
(Previous No. IP-3234)
Date Published July 1996 P
Printed in Japan
©
199960