MB90583CAPF datasheet(45/110 Pages) FUJITSU

45 / 110 page

MB90580C Series

5. External Memory Access (External Bus Pin Control Circuit)

The external bus pin control circuit controls external bus pins used to expand the address/data buses of the

CPU outside.

(1) Register configuration

(

2) Block Diagram

• Automatic ready function selection register

bit

Address

: 0000A5H

Access

Initial value

• External address output control register

bit

Address

: 0000A6H

Access

Initial value

• Bus control signal selection register

bit

Address

: 0000A7H

Access

Initial value

ARSR

IOR1 IOR0 HMR1 HMR0



LMR1 LMR0

(W)

(0)

(W)

(0)

(W)

(1)

(W)

(1)

()

(W)

(0)

(W)

(0)

HACR

E23

E22

E21

E20

E19

E18

E17

E16

(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

ECSR

CKE

RYE

HDE IOBS HMBS WRE LMBS



(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

(W)

(0)

()

P0 data

Access control

P0 direction

Data control

Address control

Access control

MB90583CAPF Datasheet(PDF) 45 Page - fujitsu semiconductor

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