Hitachi SH7032 - Refresh Control Register (RCR) BSC

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A.2.46 Refresh Control Register (RCR) BSC
• Start Address: H'5FFFFAC
• Bus Width: 8/16/32 (read), 16 (write)
Register Overview:
Bit: 15 14 13 12 11 10 9 8
Bit name: — — — — — — — —
Initial value: 0 0 0 0 0 0 0 0
R/W: — — — — — — — —
Bit: 7 6 5 4 3 2 1 0
Bit name: RFSHE RMODE RLW1 RLW0 — — — —
Initial value: 0 0 0 0 0 0 0 0
R/W: R/W R/W R/W R/W — — — —
Table A.47 RCR Bit Functions
Bit Bit Name Value Description
7 Refresh control (RFSHE) 0 No refresh control (Initial value)
(RTCNT can be used as an interval timer)
1 Refresh control
6 Refresh mode (RMODE) 0 CAS-before-RAS refresh performed (Initial value)
1 Self-refresh performed
5,4 Wait state insertion CBR 0 0 1-cycle wait state inserted (Initial value)
refresh 1,0 (RLW1, RLW0)
0 1 2-cycle wait state inserted
1 0 3-cycle wait state inserted
1 1 4-cycle wait state inserted