參數(shù)資料
型號: IBM025171
廠商: IBM Microeletronics
英文描述: 4Mb(256K X 16) MULTIPORT VIDEO RAM(4M位(256K X 16)多端口視頻RAM)
中文描述: 4Mb的(256 × 16)多端口視頻內(nèi)存(4分位(256 × 16)多端口視頻內(nèi)存)
文件頁數(shù): 45/65頁
文件大小: 841K
代理商: IBM025171
I
I
I
I
2
3
S
R
U
P
S
CAUTION:
tWC
tRP
tRAS
tCAS
tASR
tRAH
tASC
tCAH
tSU(SFR)tH(SFR)
tWSR
tRWH
tMS
tMH
tSRS
tTRP
tSDS
Last bit of old
data 255 or 127
tSDH
tSDS
tSDH
RE
CE
A0-A8
DSF
W
DQ
SC
SDQ
SE
Row
A8, A6 - A0
CA7 is don’t care
WPB
Mask
Last bit of old
data 127 or 255
New data
Write starting at
New data
TAP[A6 - A0] in the
1)
to initiate a Split Transfer.
Allow at least tTRP(min) for the completion of a transfer cycle before start initiating the new data Write.
2)
It is not a good idea to rush to start a Split Write Transfer especially when you have all the time on earth
You can start a transfer from the particular half of SAM after few cycles of write in the other half of SAM.
Don’t wait till the last moment.
Low
Old data
Data in
: “H” or “L”
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