參數(shù)資料
型號: S6A0071
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 32COM/60SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
中文描述: 32COM/60SEG驅(qū)動
文件頁數(shù): 17/29頁
文件大?。?/td> 330K
代理商: S6A0071
32COM/60SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
S6A0071
17
INTERFACE WITH MPU
1) Interface with 8bit MPU
When the interfacing data length are 8-bit, transfer is performed all at once through 8 ports, from DB0 to DB7.
An example of the timing sequence is shown below.
RS
R/W
E
Internal
signal
DB7
Internal Operation
DATA
Busy
Busy
No
Busy
DATA
Instruction
Busy Flag Check
Instruction
Busy Flag Check
Busy Flag Check
Figure 4. Example of 8bit Bus Mode Timing Diagram
2) Interface with 4bit MPU
When interfacing data length is 4-bit, only 4 ports, from DB4 to DB7, are used as data bus.
At first higher 4-bit (in the case of 8-bit bus mode, the contents of DB4 - DB7), and then lower 4-bit (in case of 8-
bit bus mode, the contents of DB0 - DB3) are transferred. So transfer is performed twice Busy Flag outputs "high"
after the second transfer are ended. An example of timing sequence is shown below.
RS
R/W
E
Internal
signal
DB7
Internal Operation
D7
Busy
AC3
No
Busy
Instruction
Busy Flag Check
Instruction
Busy Flag Check
D3
AC3
D7
D3
Figure 5. Example of 4bit Bus Mode Timing Diagram
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