參數(shù)資料
型號: HD66712
廠商: Hitachi,Ltd.
英文描述: Dot-Matrix Liquid Crystal Display Controller/Driver
中文描述: 點陣液晶顯示控制器/驅動器
文件頁數(shù): 68/88頁
文件大小: 662K
代理商: HD66712
HD66712U
431
Initializing by Instruction
If the power supply conditions for correctly operating the internal reset circuit are not met, initialization
by instructions becomes necessary.
Initializing when a length of interface is 8-bit system. (See Figure 29.)
Initializing when a length of interface is 4-bit system. (See Figure 30.)
Power on
Wait for more than 4.1 ms
Wait for more than 100
μ
s
RS
0
R/W
0
DB7
0
DB6
0
DB5
1
DB4
1
DB3DB2DB1DB0
*
*
*
*
RS
0
R/W
0
DB7
0
DB6
0
DB5
1
DB4
1
DB3DB2DB1DB0
*
*
*
*
RS
0
R/W
0
DB7
0
DB6
0
DB5
1
DB4
1
DB3DB2DB1DB0
*
*
*
*
RS
0
R/W
0
DB7
0
DB6
0
DB5
1
DB4
1
DB3
N
DB2
0
DB1DB0
*
0
0
I/D
*
0
1
S
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
Initialization ends
BF cannot be checked before this instruction.
Function set (Interface is 8 bits long.)
BF cannot be checked before this instruction.
Function set (Interface is 8 bits long.)
BF cannot be checked before this instruction.
Function set (Interface is 8 bits long.)
BF can be checked after the following instructions.
When BF is not checked, the waiting time between
instructions is longer than the execution instruction
time. (See Table 12.)
Function set
Display off
Display clear
Entry mode set
Wait for more than 15 ms
after V
rises to 4.5V
(V
= 5V during operation)
Wait for more than 40 ms
after V
rises to 2.7V
(V
CC
= 3V during operation)
Figure 29 Initializing Flow of 8-Bit Interface
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