UPD784216A datasheet(3/52 Pages) NEC

Part #	UPD784216A

Description	16-BIT SINGLE-CHIP MICROCONTROLLER

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Manufacturer	NEC [NEC]

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Data Sheet U14118EJ1V0DS

µPD78F4938A

OVERVIEW OF FUNCTIONS

(1/2)

Part Number

µPD78F4938A

Item

Number of basic instructions (mnemonics) 113

General-purpose registers

8 bits

× 32 registers × 8 banks, or 16 bits × 8 registers × 8 banks (memory map)

Minimum instruction execution time

320 ns/636 ns/1.27

µs/2.54 µs (@6.29 MHz operation)

160 ns/320 ns/636 ns/1.27

µs (@12.58 MHz operation)

Internal memory

ROM

256 KB

RAM

10496 bytes

Memory space

1 MB with program and data spaces combined

I/O port

Total

80 pins

Input

8 pins

I/O

72 pins

Pins with

LED direct drive output

24 pins

ancillary

Transistor direct drive

8 pins

functionNote

N-ch open drain drive

4 pins

Real-time output port

4 bits

× 2, or 8 bits × 1

IEBus controller

Internal (simple version)

Timer/counter

Timer/event counter 0:

Timer counter

× 1

Pulse output possible

(16 bits)

Capture register

× 1

• Toggle output

Compare register

× 2

• PWM/PPG output

• One-shot pulse output

Timer/event counter 1:

Timer counter

× 1

Real-time output port

(16 bits)

Capture register

× 1

Capture/compare register

× 1

Compare register

× 1

Timer/event counter 2:

Timer counter

× 1

Pulse output possible

(16 bits)

Capture register

× 1

• Toggle output

Capture/compare register

× 1

• PWM/PPG output

Compare register

× 1

Timer 3 (16 bits):

Timer counter

× 1

Compare register

× 1

Watch timer

Generates interrupt request at 0.5-second intervals (On-chip watch clock oscillator)

Main clock (12.58 MHz) or watch clock (32.7 kHz) selectable as input clock

Clock output

Selectable from fCLK, fCLK/2, fCLK/4, fCLK/8, or fCLK/16 (also usable as 1-bit output port)

PWM output

12-bit resolution

× 2 channels

Serial interface

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

CSI (3-wire serial I/O):

2 channels

A/D converter

8-bit resolution

× 8 channels

Watchdog timer

1 channel

ROM correction function

Internal (4 points of correction addresses can be set.)

External expansion function

Provided (up to 1 MB)

Note

Pins with ancillary functions are included in the I/O pins.

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