HD6432351 datasheet(49/1025 Pages) RENESAS

49 / 1025 page

Section 1 Overview

Rev. 3.00 Sep 15, 2006 page 15 of 988

REJ09B0330-0300

Pin No.

Type

Symbol

TFP-120 FP-128

I/O

Name and Function

Operating

mode control

MD2 to

MD0

115 to

113

125 to

123

Input

Mode pins: These pins set the

operating mode.

The relation between the settings of

pins MD2 to MD0 and the operating

mode is shown below. These pins

should not be changed while the

H8S/2350 Group is operating.

MD2

MD1

MD0

Operating

Mode

—

Mode 1

Mode 2*

Mode 3*

Mode 4

Mode 5

Mode 6*

Mode 7*

Note: * Only applies to the H8S/2351.

System control

RES

Input

Reset input: When this pin is driven

low, the chip is reset. The type of

reset can be selected according to

the NMI input level. At power-on, the

NMI pin input level should be set

high.

STBY

Input

Standby: When this pin is driven low,

a transition is made to hardware

standby mode.

BREQ

Input

Bus request: Used by an external bus

master to issue a bus request to the

H8S/2350 Group.

BREQO

Output Bus request output: The external bus

request signal used when an internal

bus master accesses external space

in the external bus-released state.

BACK

Output Bus request acknowledge: Indicates

that the bus has been released to an

external bus master.

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