參數(shù)資料
型號: HD66731A01TA0L
廠商: Hitachi,Ltd.
英文描述: Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
中文描述: 點(diǎn)陣液晶顯示控制器/驅(qū)動器支持日語漢字,韓文字體顯示
文件頁數(shù): 80/131頁
文件大?。?/td> 5332K
代理商: HD66731A01TA0L
HD66730/HD66731
79
Reset Function
The HD66730/1 is reset by setting the RESET pin to low level. During reset, the system performs next-
control-register setting and executes instructions. The busy flag (BF) therefore indicates a busy state (BF =
1) at this time, which means that only the index register and status register can be accessed.
Display clear (DDRAM reset) is performed automatically by reset input. Since more than 1,000 clocks of
execution cycles are needed to initialize the DDRAM, the reset period must be set to more than this
number. Note that if the reset input conditions specified in Electrical Characteristics are not satisfied, the
HD66730/1 will not operate correctly, and reset should be performed by software.
Initialization of Instruction Register Function
1. Index Register: IR
The index register cannot be initialized by reset. After reset release, the index register must be set to
access a control register.
2. Status register: SR
BF = 1: Busy state
3. Entry mode register: R0
I/D = 1: +1 (incrementation)
RM1/0 = 00: DDRAM selection
4. Function set register: R1
BST = 0: Booster off
EXT2/1 = 11: Driver extension enable
DT1/0 = 11: 1/53 duty drive
DCL = 1: Display-clear execution
Note:
At least 1,000 clock cycles of execution time is needed to clear the DDRAM.
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