Freescale Semiconductor /MK80F25615 /SDRAM /CTRL

Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text

Interpret as CTRL

15 1211 87 43 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0RC0 (00)RTIM 0 (0)IS

IS=0, RTIM=00

Description

Control Register

Fields

RC

Refresh count

RTIM

Refresh timing

0 (00): 3 clocks

1 (01): 6 clocks

2 (10): 9 clocks

3 (11): 9 clocks

IS

Initiate self-refresh command.

0 (0): Take no action or issue a selfx command to exit self refresh.

1 (1): SDRAM controller sends a self command to both SDRAM blocks to put them in low-power, self-refresh state where they remain until IS is cleared. When IS is cleared, the controller sends a selfx command for the SDRAMs to exit self-refresh. The refresh counter is suspended while the SDRAMs are in self-refresh; the SDRAM controls the refresh period.

Links

() ()