UPD784021 datasheet(1/90 Pages) NEC

Part #	UPD784021

Description	16/8-BIT SINGLE-CHIP MICROCOMPUTER

PDF	90 Pages

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Manufacturer	NEC [NEC]

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MOS INTEGRATED CIRCUIT

m

mPD784020, 784021

Document No.

U11514EJ1V0DS00 (1st edition)

(Previous No.

IP-3234)

Date Published

July 1996 P

Printed in Japan

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

APPLICATIONS

LBP, automatic-focusing camera, PPC, printer, electronic typewriter, air conditioner, electronic musical instru-

ments, cellular telephone, etc.

This manual describes the

m

mPD784021 unless otherwise specified.

DATA SHEET

©

1990

1996

• 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

The information in this document is subject to change without notice.

The mark H shows major revised points.

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