7516 datasheet(62/90 Pages) RENESAS

62 / 90 page

Rev.1.01

Jul 01, 2003

page 62 of 89

7516 Group

Table 16 Description of pin function (Standard Serial I/O Mode)

Description

VCC,VSS

Apply program/erase protection voltage to Vcc pin and 0 V to Vss pin.

CNVSS

Connect to VCC when VCC = 4.5 V to 5.5 V.

Connect to Vpp (=4.5 V to 5.5 V) when VCC = 2.7 V to 4.5 V.

RESET

Reset input pin. While reset is “L” level, a 20 cycle or longer clock

must be input to XIN pin.

XIN

Connect a ceramic resonator or crystal oscillator between XIN and

XOUT pins. To input an externally generated clock, input it to XIN pin

and open XOUT pin.

XOUT

Name

Power input

CNVSS

Reset input

Clock input

Clock output

I/O

AVSS

VREF

Connect AVSS to VSS .

Enter the reference voltage for AD from this pin, or open.

P00 to P07

Input “H” or “L”, or open.

P10 to P17

Input “H” or “L”, or open.

P20 to P23

This pin is for serial data input.

Analog power supply input

Reference voltage input

Input port P0

Input port P1

Input port P2

P41

Input “H” when RESET is released only.

P40, P42 to P47

P24

This pin is for serial data output.

P25

P26

This pin is for serial clock input.

P27

Input port P4

RxD input

TxD output

SCLK input

BUSY output

P30 to P37

Input port P3I

Input “H” or “L”, or open.

This pin is for BUSY signal output.

Input “H” or “L”, or open.

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