SH7050 datasheet(30/841 Pages) RENESAS

30 / 841 page

Section 1 Overview

Rev. 5.00 Jan 06, 2006 page 10 of 818

REJ09B0273-0500

Type

Symbol

Pin No.

I/O

Name

Function

Clock

EXTAL

110

Input

External clock

For connection to a crystal

resonator. An external clock

source can also be

connected to the EXTAL pin.

XTAL

108

Input

Crystal

For connection to a crystal

resonator.

125

Output

System clock

Supplies the system clock to

peripheral devices.

System

control

RES

126

Input

Power-on

reset

Executes a power-on reset

when driven low.

WDTOVF

Output

Watchdog

timer overflow

WDT overflow output signal.

BREQ

135

Input

Bus request

Driven low when an external

device requests the bus.

BACK

134

Output

Bus request

acknowledge

Indicates that the bus has

been granted to an external

device. The device that

output the

BREQ signal

recognizes that the bus has

been acquired when it

receives the

BACK signal.

Operating

mode control

MD0 to

MD3

120, 119,

111, 109

Input

Mode setting

These pins determine the

operating mode. Do not

change the input values

during operation.

HSTBY

124

Input

Hardware

standby

When driven low, this pin

forces a transition to

hardware standby mode.

Interrupts

NMI

112

Input

Nonmaskable

interrupt

Nonmaskable interrupt

request pin.

Acceptance on the rising

edge or falling edge can be

selected.

IRQ0 to

IRQ7

106, 114,

116, 117, 6,

8, 54, 133

Input

Interrupt

requests

0 to 7

Maskable interrupt request

pins.

Level input or edge input can

be selected.

SH7050 Datasheet(PDF) 30 Page - Renesas Technology Corp

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