參數(shù)資料
型號(hào)： HD66705U
廠(chǎng)商： Hitachi,Ltd.
英文描述： Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver(圖形LCD控制器/驅(qū)動(dòng)器)
中文描述： 低功耗點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器（圖形液晶顯示控制器/驅(qū)動(dòng)器）
文件頁(yè)數(shù)： 45/81頁(yè)
文件大小： 426K
代理商： HD66705U
HD66705U
45
Interface with a 4-Bit MPU
Four-bit data can be transferred in parallel by setting both the IM1 and IM0 pins to the V
CC
level (Figure
26). Four-bit data representing higher or lower bits of 8-bit instructions or 8-bit RAM data can be
transferred in that order.
The
HD66705U
can forcibly reset the counter that counts the number of higher and lower 4-bit data transfers
in a 4-bit bus interface. This function, called transfer-syncronization, can be performed by writing a special
instruction containing 0000 four consecutive times (Figure 27). For example, when a data transfer sequence
becomes disordered due to noise or some undesired factor, this function resets the counter and thus enables
resuming data transfer from the higher 4 bits. Using this function at specified intervals prevents display-
system crash.
IR7
Busy
Not
Busy
IR3
AC3
AC3
D7
D3
Instruction write
Busy flag check
Internal operation
Busy flag check
Instruction write
R/W
E
Internal signal
DB7
RS
Figure 26 4-Bit Parallel Data Transfer Timing Sequence
0000
0000
0000
0000
RS
R/W
E
DB7–
DB0
Higher
Lower
(4-bit data transfer synchronized)
(1)
(2)
(3)
(4)
Figure 27 4-Bit Data Transfer Synchronization
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66710 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver)
HD66710A00FS 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver)
HD66710A00TF 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:(Dot Matrix Liquid Crystal Display Controller/Driver)
HD66712 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver
HD66712A00TA0 制造商:Renesas Electronics Corporation 功能描述:
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