SH7080 datasheet(73/1644 Pages) RENESAS

73 / 1644 page

Section 1 Overview

Rev. 3.00 May 17, 2007 Page 15 of 1582

REJ09B0181-0300

Classification

Symbol

I/O

Name

Function

CS8 to CS0

Chip select 8 to 0 Chip-select signal for external

memory or devices.

CS7, CS3, and CS0 are available in

the SH7083.

CS7 to CS0 are available in the

SH7084/SH7085.

Bus control

Read

Indicates reading of data from

external devices.

RDWR

Read/write

Read/write signal

Bus start

Bus-cycle start

Address hold

Address hold timing signal for the

device that uses the address/data-

multiplexed bus.

Available only in the

SH7084/SH7085/SH7086.

FRAME

FRAME signal

In burst MPX-I/O interface mode,

negated before the last bus cycle to

indicate that the next bus cycle is the

last access.

Available only in the

SH7085/SH7086.

WRHH

Write to HH byte

Indicates a write access to bits 31 to

24 of the external data.

Available only in the

SH7085/SH7086.

WRHL

Write to HL byte

Indicates a write access to bits 23 to

16 of the external data.

Available only in the

SH7085/SH7086.

WRH

Write to upper

byte

Indicates a write access to bits 15 to

8 of the external data.

WRL

Write to lower

byte

Indicates a write access to bits 7 to 0

of the external data.

WAIT

Wait

Input signal for inserting a wait cycle

into the bus cycles during access to

the external space.

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