UPD780921 datasheet(5/40 Pages) RENESAS

5 / 40 page

µPD780921, 780922, 780923, 780924

FUNCTION OVERVIEW

Item

µPD780921

µPD780922

µPD780923

µPD780924

Internal

ROM

8 Kbytes

16 Kbytes

24 Kbytes

32 Kbytes

memory

Internal

512 bytes

1024 bytes

high-speed RAM

Memory space

64 Kbytes

General-purpose register

8 bits x 32 registers (8 bits x 8 registers x 4 banks)

Instruction cycle

On-chip instruction execution time variable function

0.24

µs/0.48 µs/0.96 µs/1.9 µs/3.8 µs (@ 8.38-MHz operation with system clock)

Instruction set

• 16-bit operation

• Multiply/divide (8 bits x 8 bits, 16 bits

÷ 8 bits)

• Bit manipulate (set, reset, test, Boolean operation)

• BCD adjust, etc.

I/O ports

Total

: 47

• CMOS inputs :

• CMOS I/Os

: 39

Real-time output ports

8 bits x 1 or 4 bits x 2

A/D converter

• 8-bit resolution x 8 channels

• Power supply voltage: AVDD = 2.7 to 5.5 V

Serial interface

UART x 2 channels

Timer

• 8-bit timer/event counter

: 3 channels

• 10-bit timer

: 1 channel

• Watchdog timer

: 1 channel

Timer output

9 (8-bit PWM output x 3, and inverter control output x 6)

Vectored

Maskable interrupts Internal: 12, external: 4

interrupt

Non-maskable interrupt Internal: 1

Software interrupt

Power supply voltage

VDD = 2.7 to 5.5 V

Operating ambient temperature

TA = –40 to +85

°C

Package

• 64-pin plastic shrink DIP (750 mil)

• 64-pin plastic QFP (14 x 14 mm)

Product Name

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