M3885 datasheet(75/103 Pages) RENESAS

75 / 103 page

3885 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS

Table 20 Description of Pin Function (Flash Memory Parallel I/O Mode)

Pin name

Signal name

I/O

Function

VCC,VSS

Power supply input

Apply 3.0 ± 0.3 V to the Vcc pin and 0 V to the Vss pin.

CNVSS

Power suppy input

Connect to Vpp = 5V ± 0.5V.

Reset input

Input “L” level.

RESET

XIN

Clock input

Connect a ceramic or crystal resonator between the XIN and XOUT pins.

When entering an externally derived clock, enter it from XIN and leave

XOUT open.

XOUT

Clock output

AVSS

Analog power supply input

VREF

Reference voltage input

Connect to Vss.

P00 to P07

Data I/O D0 to D7

These are data D0–D7 input/output pins.

I/O

P10 to P17

These are address A8–A15 input pins.

Address input A0 to A7

This is address A0–A7 input pins.

P20 to P27

P30

Input P30

Input “H” or “L” or keep open.

Address input A8 to A15

P33

P34

WE input

RP input

This is a RP input pin.

This is a WE input pin.

P37

P36

P47

Input P47

CE input

OE input

This is a OE input pin.

This is a CE input pin.

P35

RY/BY output

This is a RY/BY output pin.

P50 to P57

Input P5

P40 to P45

Input P40 to P45

P31

BSEL input

This is a BSEL input pin.

P32

Input P32

Input “H” or “L” or keep open.

P46

Flash mode Input

Connect “L” for Pallarel I/O mode.

Input “H” or “L” or keep open.

P60 to P67

Input P6

P70 to P77

Input P7

P80 to P87

Input P8

Input “H” or “L” or keep open.

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