H8SLASH3028F datasheet(140/923 Pages) RENESAS

No. de pieza	H8/3028F

Descripción Electrónicos	Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

PDF	923 Pages

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Fabricante Electrónico	RENESAS [Renesas Technology Corp]

Página de inicio	http://www.renesas.com

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140 / 923 page

Rev. 2.00, 09/03, page 110 of 890

6.1.3

Pin Configuration

Table 6.1 summarizes the input/output pins of the bus controller.

Table 6.1

Bus Controller Pins

Name

Abbreviation

I/O

Function

Chip select 0 to 7

CS0 to CS7

Output

Strobe signals selecting areas 0 to 7

Address strobe

Output

Strobe signal indicating valid address output

on the address bus

Read

Output

Strobe signal indicating reading from the

external address space

High write

HWR

Output

Strobe signal indicating writing to the external

address space, with valid data on the upper

data bus (D15 to D8)

Low write

LWR

Output

Strobe signal indicating writing to the external

address space, with valid data on the lower

data bus (D7 to D0)

Wait

WAIT

Input

Wait request signal for access to external

three-state access areas

Bus request

BREQ

Input

Request signal for releasing the bus to an

external device

Bus acknowledge

BACK

Output

Acknowledge signal indicating release of the

bus to an external device

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