H8SX1663 datasheet(516/1158 Pages) RENESAS

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Section 9 I/O Ports

Rev.1.00 Jun. 07, 2006 Page 464 of 1102

REJ09B0294-0100

(5) PB3/

CS3-A/CS7-A/CAS

The pin function is switched as shown below according to the combination of operating mode,

EXPE bit, bus controller register, port function control register (PFCR), and the PB3DDR bit

settings.

Setting

Bus Controller

I/O Port

Module Name

Pin Function

CAS_OE

CS3A_OE

CS7A_OE

PB3DDR

CAS output*



CS3-A output*



Bus controller

CS7-A output*



PB3 output

I/O port

PB3 input

(initial setting)

Note:

Valid in external extended mode (EXPE = 1)

(6) PB2/

CS2-A/CS6-A/RAS

The pin function is switched as shown below according to the combination of operating mode,

EXPE bit, bus controller register, port function control register (PFCR), and the PB2DDR bit

settings.

Setting

Bus Controller

I/O Port

Module Name

Pin Function

RAS_OE

CS2A_OE

CS6A_OE

PB2DDR

RAS output*



CS2-A output*



Bus controller

CS6-A output*



PB2 output

I/O port

PB2 input

(initial setting)

Note:

Valid in external extended mode (EXPE = 1)

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