UPD75238GJ View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD75238GJ

4 BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75238

FUNCTIONS

Item

On-chip memory

I/O lines

(Excluding pins dedicated to FIP)

Instruction cycle

Fluorescent display tube (FIP)

controller/driver

Timer/counter

Serial interface

Interrupt

System clock oscillator

Mask option

Operating temperature

Operating voltage

Package

Function

ROM: 32640 × 8 bits, RAM: 1024 × 4 bits

• Input : 16 lines

64 lines • I/O : 24 lines

• Output : 24 lines

• 0.67 µs/1.33 µs/2.67 µs/10.7 µs (at 6.0 MHz)

• 0.95 µs/1.91 µs/3.82 µs/15.3 µs (at 4.19 MHz)

• 122 µs (at 32.768 kHz)

• Number of segments : 9 to 24 segments

• Number of digits : 9 to 16 digits

• Dimmer function : 8 levels

• Pull-down resistors provided by mask option

• Key scan interrupt generator

• Basic interval timer : Usable as watchdog timer

• Timer/event counter

5 channels • Clock timer

: With buzzer output function

• Timer/pulse generator : With 14-bit PWM output function

• Event counter

2 channels • SBI or 3-wire mode

• 3-wire mode

• Allows multiple hardware interrupts.

• Detection of both edges

• External interrupts : 3 • Detection edge programmable (with noise

elimination)

• Detection edge programmable

• External test input : 1 • Rising edge detection

• Timer/pulse generator

• Timer/event counter

• Internal interrupts : 5 • Basic interval timer

• Serial interface #0

• For key scanning

• Internal test inputs: 2 • Clock timer

• Serial interface #1

• Main system clock : 6.0 MHz, 4.19 MHz

• Subsystem clock : 32.768 kHz, standard

• High-voltage port : Pull-down resistor or open-drain output

• Ports 4 and 5 : Pull-up resistor

• Port 7

: Pull-down resistor

-40 to +85 °C

2.7 to 6.0 V (Data held in standby mode: 2.0 to 6.0 V)

94-pin plastic QFP (20 × 20 mm)

2

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