參數(shù)資料
型號: SM5904BF
廠商: Seiko NPC Corporation
英文描述: compression and non compression type shock-proof memory controller
中文描述: 壓縮和非壓縮式防震內(nèi)存控制器
文件頁數(shù): 8/35頁
文件大小: 266K
代理商: SM5904BF
NIPPON PRECISION CIRCUITS-8
SM5904BF
Parameter
Symbol
Condition
Rating
Typ
1/96fs
1/48fs
Unit
Min
Max
ZSCK pulsewidth
ZSCK pulse cycle
t
SCOW
t
SCOY
t
DHL
t
DLH
15 pF load
15 pF load
15 pF load
15 pF load
ZSRDATA and ZLRCK output delay time
0
0
60
60
ns
ns
DRAM access timing (NRAS, NCAS2, NWE, A0 to A9, D0 to D3)
Parameter
Symbol
Condition
Rating
Typ
5
Unit
Min
Max
NRAS pulsewidth
t
RASL
t
RASH
t
RCD
t
CASH
t
CASL
t
RADS
t
RADH
t
CADS
t
CADH
t
CWDS
t
CWDH
t
CRDS
t
CRDH
t
WEL
t
WCS
15 pF load
15 pF load
15 pF load
15 pF load
15 pF load
15 pF load
15 pF load
15 pF load
15 pF load
15 pF load
15 pF load
t
CY
(note)
t
CY
t
CY
t
CY
t
CY
t
CY
t
CY
t
CY
t
CY
t
CY
t
CY
ns
ns
t
CY
t
CY
ms
ms
ms
ms
3
NRAS falling edge to NCAS2 falling edge
NCAS2 pulsewidth
2
5
3
1
1
1
5
3
3
NRAS
Setup time
Hold time
Setup time
Hold time
Setup time
Hold time
Input setup
Input hold
falling edge to address
NCAS2
falling edge to address
NCAS2
falling edge to data write
NCAS2
rising edge to data read
40
0
NWE pulsewidth
15 pF load
15 pF load
6
3
NWE falling edge to NCAS2 falling edge
Refresh cycle
(fs = 44.1 kHz playback)
Memory system ON
Decode sequence operation(READ=H)
Non
compression
2.8
7.3
8.8
10.9
t
REF
4M
6-bit compression
DRAM
5-bit compression
× 1
or
× 2
4-bit compression
Note.
t
CY
is the system clock (CLK) input (384fs) cycle time.
t
CY
= 59 ns when fs = 44.1 kHz
ZSCK
ZSRDATA
ZLRCK
0.5V
DD
t
DLH
0.5V
DD
DHL
t
SCOW
t
SCOW
t
SCOY
t
Serial output (ZSRDATA, ZLRCK, ZSCK pins)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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