參數(shù)資料
型號: SMJ55161
廠商: Texas Instruments, Inc.
英文描述: 262144 BY 16-BIT MULTIPORT VIDEO RAM
中文描述: 262144由16位多端口視頻內(nèi)存
文件頁數(shù): 42/64頁
文件大?。?/td> 1505K
代理商: SMJ55161
SMJ55161
262144 BY 16-BIT
MULTIPORT VIDEO RAM
SGMS056D – MAY 1995 – REVISED OCTOBER 1997
42
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
PARAMETER MEASUREMENT INFORMATION
RAS
CASx
A0–A8
WE
TRG
DSF
DQ0–DQ15
tc(rdW)
tw(RL)
td(RLCH)
td(RLCL)
td(CLRH)
tw(CL)
tw(RH)
td(CHRL)
tw(CH)
tsu(RA)
th(RA)
th(RLCA)
th(CLCA)
tsu(CA)
1
2
3
tsu(SFC)
th(SFC)
th(TRG)
tsu(rd)
tsu(WCH)
tsu(WRH)
tsu(TRG)
th(RLW)
th(WLG)
th(CLW)
td(CLWL)
tw(WL)
tsu(WMR)
ta(CA)
tsu(DQR)
ta(C)
td(GHD)
tsu(DWL)
th(WLD)
tdis(G)
ta(G)
Row
Column
Valid
Out
td(CLGH)
td(CARH)
td(RLCA)
td(CHRL)
th(RSF)
tw(TRG)
th(RWM)
td(CAWL)
th(RDQ)
ta(R)
td(RLWL)
tsu(SFR)
td(DGL)
td(DCL)
th(SFR)
td(CACH)
Figure 33. Read-Write-/Read-Modify-Write-Cycle Timing
Table 9. Read-Write-/Read-Modify-Write-Cycle State Table
CYCLE
STATE
2
1
3
Write operation (nonmasked)
H
Don’t care
Valid data
Write operation with nonpersistent write-per-bit
L
Write mask
Valid data
Write operation with persistent write-per-bit
L
Don’t care
Valid data
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