SM5859AF Datasheet, PDF (30/33 Pages) Nippon Precision Circuits Inc – compression and non compression type antishock memory controller

SM5859AF
DRAM write timing (NRAS, NCAS, NOE, NWE, A0 to A9, D0 to D3)
Write timing (with single DRAM)
NRAS
NCAS
A0 to A9
D0 to D3
(WRITE)
t RASL
t RCD
t CASL
t RADS
t RADH
t CADS
t CADH
t CWDS
t CWDH
t RASH
t CASH
NOE
(WRITE)
t WEL
NWE
(WRITE)
Write timing (with 2 DRAMs)
NRAS
NCAS
(DRAM1 SELECT)
t RASL
t RCD
t CASL
t RASH
t CASH
NCAS
(DRAM2 SELECT)
NCAS2
(DRAM1 SELECT)
NCAS2
(DRAM2 SELECT)
A0 to A9
D0 to D3
(WRITE)
NWE
(WRITE)
t RCD
t CASL
t RADS
t RADH
t CADS
t CADH
t CWDS
t CWDH
t _WEL
t CASH
NIPPON PRECISION CIRCUITS-30