sm5907af Seiko NPC Corp., sm5907af Datasheet - Page 9

• Manufacturer Part Number: sm5907af
• Description: Compression And Non Compression Type Shock-proof Memory Controller
• Manufacturer: Seiko NPC Corp.

DRAM access timing (with single DRAM)
DRAM access timing (with double DRAMs)
(DRAM1 SELECT)
(DRAM2 SELECT)
NCAS2, NCAS3
NCAS
A0 to A10
The NWE terminal output is fixed HIGH during read timing.
A0 to A10
The NWE terminal output is fixed HIGH during read timing.
NCAS terminal output is fixed HIGH when selecting "DRAM2".
NCAS2/NCAS3 terminal outputs are fixed HIGH when selecting "DRAM1".
D0 to D3
D0 to D3
D0 to D3
(WRITE)
D0 to D3
(WRITE)
(WRITE)
(WRITE)
(READ)
(READ)
NWE
NWE
NCAS
NRAS
NRAS
t
t
1
1
RADS
RADS
t
t
CY
CY
t
WCS
t
3
WCS
t
CY
t
t
t
t
3
3
3
1
t
1
RADH
CWDS
CWDS
RADH
WCS
t
t
t
t
t
CY
CY
CY
CY
CY
t
2
t
2
t
2
RCD
RDC
RCD
t
t
t
CY
CY
CY
t
1
t
1
CADS
t
CADS
t
CY
CY
6
t
t
6
WEL
WEL
t
t
CY
CY
SM5907AF
t
5
t
5
RASL
RASL
t
t
CY
CY
t
3
t
t
CASL
3
3
CWDH
t
t
t
3
3
CWDH
CY
t
CASL
CASL
t
CY
t
t
CY
CY
CY
t
t
t
t
5
5
CADH
CRDS
CADH
CRDS
t
t
CY
CY
t
t
CRDH
CRDH
NIPPON PRECISION CIRCUITS-9
t
t
3
RASH
3
RASH
t
CY
t
CY
t
t
t
5
5
5
CASH
CASH
CASH
t
t
t
CY
CY
CY