SH7136 datasheet(37/1160 Pages) RENESAS

37 / 1160 page

Section 1 Overview

Rev. 2.00 Sep. 10, 2008 Page 11 of 1130

REJ09B0402-0200

Classification

Symbol

I/O

Name

Function

MD1, MD0

Mode set

Sets the operating mode. Do not

change values on these pins during

operation. Only MD1 is available in

the SH7136.

Operating mode

control

FWE

Flash memory

write enable

Pin for flash memory

Flash memory can be protected

against programming or erasure

through this pin.

RES

Power-on reset

When low, this LSI enters the power-

on reset state.

MRES

Manual reset

When low, this LSI enters the

manual reset state.

WDTOVF

Watchdog timer

overflow

Output signal for the watchdog timer

overflow

Use a resistor of 1 M

Ω or more when

this pin needs to be pulled down.

BREQ

Bus-mastership

request

Low when an external device

requests the release of the bus

mastership. This pin is available only

on the SH7137.

System control

BACK

Bus-mastership

request

acknowledge

Indicates that the bus mastership

has been released to an external

device. Reception of the

BACK

signal informs the device which has

output the

BREQ signal that it has

acquired the bus. This pin is

available only on the SH7137.

SH7136 Datasheet(PDF) 37 Page - Renesas Technology Corp

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