SM5901AF Datasheet, PDF (9/31 Pages) Nippon Precision Circuits Inc – compression and non compression type anti-shock memory controller with built-in 1M DRAM

SM5901AF
DRAM access timing (when external DRAM is used)
NRAS
NCAS2
(DRAM2 SELECT)
A0 to A9
D0 to D3
(WRITE)
D0 to D3
(READ)
NWE
(WRITE)
t RASL
5t CY
t RASH
3t CY
t RCD
2t CY
t CASL
3t CY
t CASH
5t CY
t RADS
1t CY
t RADH
1t CY
t CADS
1t CY
t CADH
5t CY
t CWDS
3t CY
t CWDH
3t CY
t CRDS
t CRDH
t WCS
3t CY
t WEL
6t CY