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參數(shù)資料
型號: W88113C
廠商: WINBOND ELECTRONICS CORP
英文描述: ATAPI CD-ROM DECODER & CONTROLLER
中文描述: ATAPI的CD - ROM解碼器
文件頁數(shù): 63/102頁
文件大?。?/td> 573K
代理商: W88113C
W88113C
Publication Release Date: Mar. 1999
- 59 - Revision 0.61
Bit 3: SBCK - Select BCK as subcode clock
When this bit is high, the
pin BCK (10)
is selected as subcode reference clock instead of
system clock. This setting is suitable for drive using CAV subcode.
Bit 2: CAS8B - Eight CAS in One RAS Enable
When this bit is set low, maximum the number of Column Address Strobe is 8 instead of 4 in
one DRAM FPM cycle.
Bit 1: FRCDB - Fast RAS to CAS Delay
The bit controls the timing of tRCD and tRP.
Bit 0: EDOEN - EDO DRAM Support Enable
Setting this bit enables EDO DRAM support and the data latch timing of DRAM changes to
falling edge instead of rising edge of internal clock.
DRAM Timing Setting
The timing of DRAM is controlled by
MRCD (88h.5)
and
FRCDb (88h.1)
. The slower timing
may be required to support some slower DRAMs.
MRCD
FRCDB
tRCD
tRP
tPC
Minimum Cycle
0
0
1 T
1.5 T
1 T
3 T
0
1
2 T
1.5 T
1 T
4 T
1
0
1.5 T
1 T
1 T
3 T
1
1
x
x
x
x
Where T is the system clock period.
DRAM Timing
tRP
RASB
CASB
tRCD
tPC
tRAS
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PDF描述
W88113CD ATAPI CD-ROM DECODER & CONTROLLER
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