參數(shù)資料
型號: HD66726
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)動器驅(qū)動程序)
文件頁數(shù): 61/117頁
文件大?。?/td> 1549K
代理商: HD66726
HD66726
61
Parallel Data Transfer
8-bit Interface
Setting the IM2/1/0 (interface mode) to the GND/V
CC
/GND level allows 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.
When the number of buses or the 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
HD66726
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 4-bit parallel data transfer using
pins DB7/KIN7-DB4/KIN4. 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 HD66726 supports the transfer synchronization function which resets the upper/lower counter
to count upper/lower 4-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PDF資料
PDF描述
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)動器)
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相關代理商/技術參數(shù)
參數(shù)描述
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