參數(shù)資料
型號(hào)： HD66724
廠商： Hitachi,Ltd.
英文描述： Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動(dòng)器)
中文描述： 圖形液晶顯示控制器/鍵掃描功能（帶鍵掃描功能的圖形液晶顯示控制器/驅(qū)動(dòng)器驅(qū)動(dòng)程序）
文件頁數(shù)： 64/117頁
文件大?。?/td> 834K
代理商： HD66724
HD66724/HD66725
64
Parallel Data Transfer
8-Bit Interface
Setting the IM2/1/0 (interface mode) to the GND/V
CC
/GND level allows 68-system 8-bit parallel data
transfer. A direct interface using the 8-bit E-clock-synchronized bus or an interface via the I/O bus can be
established. Setting the IM2/1/0 to the V
CC
/V
CC
/GND level allows 80-system 8-bit parallel data transfer.
When the number of buses or mounting area is limited, use a 4-bit bus interface or serial data transfer.
Using a parallel bus interface disables the key scan function. To prevent this, use a clock-synchronized
serial interface.
C0
C1
C2
A0–A7
E
RS
R/W
DB0–DB7
H8/325
HD66724
HD66725
8
*Interface via I/O port
Figure 32 Interface to 8-Bit Microcomputer
4-Bit Interface
Setting the IM2/1/0 (interface mode) to the GND/V
CC
/V
CC
level allows 68-system 4-bit parallel data
transfer using pins DB7/KIN7-DB4/KIN4. Setting the IM2/1/0 to the V
CC
/V
CC
/V
CC
level allows 80-system
4-bit parallel data transfer. 8-bit instructions and RAM data are divided into four upper/lower bits and
transfer starts from the upper four bits.
Using a parallel bus interface disables the key scan function. To prevent this, use a clock-synchronized
serial interface.
Note:
Transfer synchronization function for a 4-bit bus interface
The HD66724/HD66725 support transfer synchronization function which resets the upper/lower
counter to count upper/lower four-bit data transfer in the 4-bit bus interface. Noise causing transfer
mismatch between the four upper and lower bits can be corrected by a reset triggered by
consecutively writing a 0000 instruction four times. The next transfer starts from the upper four
bits. Executing synchronization function periodically can recover any runaway in the display
system.
相關(guān)PDF資料
PDF描述
HD66725 Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動(dòng)器)
HD66726 Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動(dòng)器)
HD66727 Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動(dòng)器)
HD66728 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點(diǎn)圖形LCD控制器)
HD66730 Dot-Matrix Liquid Crystal Display Controller/Driver(點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66724/HD66725 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HD66724RA03TA0L 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD CONTROLLER
HD66725 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:112 x 80-dot Graphics LCD Controller/Driver
HD66725A03TA0L 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD CONTROLLER
HD66726 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions
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