參數(shù)資料
型號(hào): M66273FP
廠商: Mitsubishi Electric Corporation
英文描述: LCD CONTROLLER with VRAM
中文描述: 液晶顯示控制器顯存
文件頁數(shù): 30/34頁
文件大?。?/td> 297K
代理商: M66273FP
LCD CONTROLLER with VRAM
M66273FP
MITSUBISHI <DIGITAL ASSP>
Ver.3.1 Dec,1999
(5) Write to VRAM ( RD = "H",WAITCNT= "L" or "H" fixed )
Term of cycle steal access (and When setting register WAITC to "0")
tC(CLK)
tsu(A-MCS)
tsu(A-WR)
th(WR-A)
tw(WR)
tw(MCS)
th(MCS-A)
th(MCS-D)
tpHL(MCS-WAIT)
tpHL(WR-WAIT)
tpLH(CLK-WAIT)
Address is established
Data input is established
tC(CLK)
tWL(CLK)
ta(RD-D)
ta(MCS-D)
tsu(A-MCS)
tsu(A-RD)
th(RD-A)
th(MCS-A)
tdis(MCS-D)
tpHL(MCS-WAIT)
tpHL(RD-WAIT)
tpLH(CLK-WAIT)
tpd(D-WAIT)
Data output is established
Address is established
MPUCLK
MCS
WAIT
D<7:0>
(D<15:0>)
LWR
(+HWR)
A<14:0>
(+BHE)
MPUCLK
MCS
WAIT
D<7:0>
(D<15:0>)
RD
A<14:0>
tWH(CLK) tWL(CLK)
th(WR-D)
Term of cycle steal access (and when setting segester WAITC to "0")
(6) Read from VRAM( LWR, HWR = "H",WAITCNT = "L" or "H" fiexed)
tWH(CLK)
tdis(RD-D)
Note 4 :Writing/reading operation for VRAM during cycle steal access needs 0.5tc(MAINCLK) + 1tc(CLK) in best case or 2.5tc(MAINCLK)+1tc(CLK) in
worst case, according to the condition of the internal cycle steal at starting access requested from MPU.
Data output D is established before changing WAIT output.
tc(
MAINCLK
) = Reference clock cycle time for internal operation after setting division of MPUCLK.
5 : Limits of MCS, LWR (+HWR) and RD are prescribed by the input signal of last change to
"L" in starting access, and by the input signal of
first change to "H" in ending access.
6 : Always once return MCS, LWR (+HWR) or RD to "H" after canceling WAIT output. In case of latching "L", as next WAIT does not output, this
causes malfunction to occur.
30
tsu(D-CLK)
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