HD6417618 datasheet(164/646 Pages) RENESAS

164 / 646 page

Section 7 Bus State Controller (BSC)

Rev. 6.00 Jun. 12, 2007 Page 132 of 610

REJ09B0131-0600

Bit

Bit Name

Initial

Value

R/W

Description



Reserved

This bit is always read as 0. The write value should

always be 0.

WTRC1

WTRC0

R/W

Idle Cycle Number from REF Command/Self-Refreshing

Release to ACTV/REF/MRS Command

Specify the number of minimum idle cycles in the

following cases.

• From the issuing of the REF command to the issuing

of the ACTV/REF/MRS command.

• From the self-refreshing release to the issuing of the

ACTV/REF/MRS command.

00: 2 cycles

01: 3 cycles

10: 5 cycles

11: 8 cycles

PCMCIA:

• CS5BWCR, CS6BWCR

Bit

Bit Name

Initial

Value

R/W

Description

31 to 22



All 0

Reserved

These bits are always read as 0. The write value should

always be 0.

SA1

SA0

R/W

Space Attribute Specification

Specify memory card interface or I/O card interface when

the PCMCIA interface is selected.

• SA1

0: Specifies memory card interface when A25 = 1

1: Specifies I/O card interface when A25 = 1

• SA0

0: Specifies memory card interface when A25 = 0

1: Specifies I/O card interface when A25 = 0

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