參數(shù)資料
型號: IBM025170
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): 43/65頁
文件大?。?/td> 841K
代理商: IBM025170
I
I
I
I
2
3
S
R
U
P
S
tRC
tRP
tRAS
tCAS
tASR
tRAH
tASC
tCAH
tSU(SFR)
tH(SFR)
tWSR
tRWH
tTLS
tTLH
tD(TPRL)
tD(RHMS)
tSCA
RE
CE
A0-A8
DSF
W
TRG
SC
SDQ
SE
a minimum delay of tD(TPRL) to avoid contention.
Note that the transfer can wait in Split-Register Transfer operations. Don’t rush to start a transfer.
Never wait too long to start a transfer to the particular half of SAM. The transfer cycle must have
CAUTION:
Row
CA8, A6-A0
Tap ‘N’
CA7 is don’t care
CA8 determines which part of the row to transfer
Bit 127
or 255
Tap
point “M” bit
Bit 255
or 127
Never start a transfer at the same time the last bit from a particular half of SAM is being read. Allow
1)
been completed ahead of time by a minimum time of tD(RHMS) before the SC clock reads the last bit out of the
2)
Never wait till the last moment to initiate a Split-Register Transfer.
Low
: “H” or “L”
tSCA
tSCA
Tap point
“M”
Tap point
“N”
tRSD
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