H8SLASH3003 datasheet(158/715 Pages) RENESAS

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Bit 4—Strobe Mode Select (CAS/

WE): Selects 2CAS or 2WE mode. The setting of this bit is

valid when PSRAME = 0 and DRAME = 1. This bit is write-disabled when the PSRAME or

DRAME bit is set to 1.

Bit 4

CAS/

Description

WE mode

(Initial value)

CAS mode

Bit 3—Address Multiplex Mode Select (M9/

M8): Selects 8-bit or 9-bit column addressing.

The setting of this bit is valid when PSRAME = 0 and DRAME = 1. This bit is write-disabled

when the PSRAME or DRAME bit is set to 1.

Bit 3

M9/

Description

8-bit column address mode

(Initial value)

9-bit column address mode

Bit 2—Refresh Pin Enable (RFSHE): Enables or disables refresh signal output from the

RFSH pin. This bit is write-disabled when the PSRAME or DRAME bit is set to 1.

Bit 2

RFSHE

Description

Refresh signal output at the

RFSH pin is disabled

(Initial value)

(the

RFSH pin can be used as a generic input/output port)

Refresh signal output at the

RFSH pin is enabled

Bit 1—Reserved: Read-only bit, always read as 1.

Bit 0—Refresh Cycle Enable (RCYCE): Enables or disables insertion of refresh cycles.

The setting of this bit is valid when PSRAME = 1 or DRAME = 1. When PSRAME = 0 and

DRAME = 0, refresh cycles are not inserted regardless of the setting of this bit.

Bit 0

RCYCE

Description

Refresh cycles are disabled

(Initial value)

Refresh cycles are enabled for area 3

140

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