SH7014 datasheet(648/754 Pages) RENESAS

648 / 754 page

Appendix A On-Chip Supporting Module Registers

Rev.5.00 Sep. 27, 2007 Page 614 of 716

REJ09B0398-0500

BSC

Refresh Timer Control/Status Register (RTCSR)

H'FFFF862C

8/16/32

Bit

Item

Bit name

―

Initial value

R/W

Item

Bit name

―

CMF

CMIE

CKS2

CKS1

CKS0

RFSH

RMD

Initial value

R/W

Bit

Name

Value

Description

Clear condition: After RTCSR is read when CMF is

1, 0 is written in CMF

(initial value)

Compare Match Flag (CMF)

Set condition: RTCNT = RTCOR

Note: When both RTCNT and RTCOR are in an

initialized state (when values have not been

rewritten since initialization, and RTCNT has

not had its value changed due to a countup),

RTCNT and RTCOR match, as both are

H'0000, but in this case CMF is not set.

Disables an interrupt request caused by CMF

(initial value)

Compare Match Interrupt

Enable (CMIE)

Enables an interrupt request caused by CMF

Stops count-up

(initial value)

φ/2

φ/8

φ/32

φ/128

φ/512

φ/2048

4 to 2

Clock Select (CKS2 to CKS0)

φ/4096

Do not refresh DRAM

(initial value)

Refresh Control (RFSH)

Refresh DRAM

CAS-before-RAS refresh

(initial value)

Refresh Mode (RMD)

Self-refresh

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