UPD784021 datasheet(3/90 Pages) NEC

3 / 90 page

mPD784020, 784021

FUNCTIONS

mPD784020

mPD784021

113

8 bits

¥ 16 registers ¥ 8 banks, or 16 bits ¥ 8 registers ¥ 8 banks (memory mapping)

160 ns/320 ns/640 ns/1280 ns (at 25 MHz)

None

512 bytes

2048 bytes

Program and data: 1M byte

4 bits

¥ 2, or 8 bits ¥ 1

Timer/counter 0:

Timer register

¥ 1

Pulse output capability

(16 bits)

Capture register

¥ 1

Ý Toggle output

Compare register

¥ 2

Ý PWM/PPG output

Ý One-shot pulse output

Timer/counter 1:

Timer register

¥ 1

Pulse output capability

(8/16 bits)

Capture register

¥ 1

Ý Real-time output (4 bits ¥ 2)

Capture/compare register

¥ 1

Compare register

¥ 1

Timer/counter 2:

Timer register

¥ 1

Pulse output capability

(8/16 bits)

Capture register

¥ 1

Ý Toggle output

Capture/compare register

¥ 1

Ý PWM/PPG output

Compare register

¥ 1

Timer 3

Timer register

¥ 1

(8/16 bits)

Compare register

¥ 1

12-bit resolution

¥ 2 channels

UART/IOE (3-wire serial I/O) : 2 channels (incorporating baud rate generator)

CSI (3-wire serial I/O, SBI)

: 1 channel

8-bit resolution

¥ 8 channels

8-bit resolution

¥ 2 channels

1 channel

HALT/STOP/IDLE mode

23 (16 internal, 7 external (sampling clock variable input: 1)) + BRK instruction

BRK instruction

1 internal, 1 external

15 internal, 6 external

Ý 4-level programmable priority

Ý 3 operation statuses: vectored interrupt, macro service, context switching

VDD = 2.7 to 5.5 V

80-pin plastic QFP (14

¥ 14 mm)

80-pin plastic TQFP (fine pitch) (12

¥ 12 mm): for the

mPD784021 only

Note

Additional function pins are included in the I/O pins.

ROM

RAM

Total

Input

Input/output

Output

Pins with pull-

up resistor

LED direct

drive outputs

Transistor

direct drive

Product

Item

Number of basic instructions

(mnemonics)

General-purpose register

Minimum instruction execution

time

Internal

memory

Memory space

I/O ports

Additional

function

pinsNote

Real-time output ports

Timer/counter

PWM outputs

Serial interface

A/D converter

D/A converter

Watchdog timer

Standby

Interrupt

Source

Software

Nonmaskable

Maskable

Supply voltage

Package

UPD784021 Datasheet(PDF) 3 Page - NEC

UPD784021 Datasheet(HTML) 3 Page - NEC

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