M38270E1-XXXFP View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M38270E1-XXXFP

Single-chip 8-bit CMOS microcomputer. PROM 61440 bytes, RAM 2048 bytes. One time PROM version.

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

3827 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

PIN DESCRIPTION

Table 1 Pin description (1)

Pin

VCC, VSS

VREF

AVSS

RESET

XIN

Name

Power source

Analog refer-

ence voltage

Analog power

source

Reset input

Clock input

XOUT

Clock output

VL1–VL3

LCD power

source

C1, C2

Charge-pump

capacitor pin

COM0–COM3 Common output

SEG0–SEG17 Segment output

P00/SEG26– I/O port P0

P07/SEG33

P10/SEG34– I/O port P1

P15/SEG39

P16, P17

P20 – P27 I/O port P2

P30/SEG18 – Output port P3

P37/SEG25

Function

Function except a port function

•Apply voltage of 2.2 V to 5.5 V to VCC, and 0 V to VSS.

•Reference voltage input pin for A-D converter and D-A converter.

•GND input pin for A-D converter and D-A converter.

•Connect to VSS.

•Reset input pin for active “L”.

•Input and output pins for the main clock generating circuit.

•Connect a ceramic resonator or a quartz-crystal oscillator between the XIN and XOUT pins to set

the oscillation frequency.

•If an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.

•Input 0 ≤ VL1 ≤ VL2 ≤ VL3 ≤ VCC voltage.

•Input 0 – VL3 voltage to LCD.

•External capacitor pins for a voltage multiplier (3 times) of LCD contorl.

•LCD common output pins.

•COM2 and COM3 are not used at 1/2 duty ratio.

•COM3 is not used at 1/3 duty ratio.

•LCD segment output pins.

•8-bit output port.

•CMOS compatible input level.

•LCD segment output pins

•CMOS 3-state output structure.

•Pull-up control is enabled.

•I/O direction register allows each port to be individually

programmed as either input or output.

•6-bit output port with same function as port P0.

•CMOS compatible input level.

•CMOS 3-state output structure.

•Pull-up control is enabled.

•I/O direction register allows each 6-bit pin to be pro-

grammed as either input or output.

•2-bit I/O port.

•CMOS compatible input level.

•CMOS 3-state output structure.

•I/O direction register allows each pin to be individually programmed as either input or output.

•Pull-up control is enabled.

•8-bit I/O port with same function as port P0.

•CMOS compatible input level.

•Key input (key-on wake-up) interrupt

input pins

•CMOS 3-state output structure.

•Pull-up control is enabled.

•8-bit output port with same function as port P0.

•CMOS 3-state output structure.

•Port output control is enabled.

•LCD segment output pins

4

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