SH7205 Datasheet, PDF (351/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 10 Bus State Controller (BSC)
CKIO
Auto-refresh cycle
Self-refresh mode
(CKE = L)
SDRAM command
RFA DSL DSL RFS
DREFW
DSL: Deselect command
RFA: Auto-refresh command
RFS: Self-refresh entry command
Figure 10.8 Example of Timing of Transition to Self-Refresh Mode
(DREFW Bits = 0010)
CKIO
SDRAM command
Self-refresh mode
(CKE = L)
Exiting from
self-refresh mode
Auto-refresh cycle
RFX DSL DSL RFA DSL DSL
DREFW
DREFW
DSL: Deselect command
RFA: Auto-refresh command
RFX: Self-refresh exit command
Figure 10.9 Example of Timing of Recovery from Self-Refresh Mode
(DREFW Bits = 0010)
Rev. 1.00 Mar. 25, 2008 Page 319 of 1868
REJ09B0372-0100