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參數(shù)資料
| 型號： | S-4543A |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | Dot Matrix LCD Driver(點陣LCD驅(qū)動器) |
| 中文描述： | 點陣LCD驅(qū)動器（點陣液晶驅(qū)動器） |
| 文件頁數(shù)： | 13/27頁 |
| 文件大?。?/td> | 163K |
| 代理商： | S-4543A |
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Dot Matrix LCD Driver
S-4543A
12
Seiko Instruments Inc.
2.2 Serial Interface
P / SX
E1, E2
R / WX
A0
D0
D1
D2
D3
～
D7
: Serial interface (Connected to VSS).
: “L” active.
: “L” write instruction.
: “L” command data.
: Serial data input pin (SDI)
: Serial clock input pin (SCLK)
: Serial data output pin (SDO)
: Open
“H” is reset.
“H” read instruction.
“H” displayed data.
Note: The displayed data write instruction and read instruction cannot activate E1 and E2 at the same time.
By setting P/SX to “L”, the serial interface is selected.
The instruction code is the same as for the parallel interface.
By setting E1, and E2 to “H”, the serial interface circuit is reset and the counter is initialized. Either E1 or E2 is
set to “L”, the serial interface enters an operating state.
The commands and displayed data are written at the rising edge of serial clock. Data is input in the order D0 to
D7 in 8-bit data. The status and displayed data are read at the falling edge of the serial clock.
Further, displayed data reading needs dummy reading.
E1 and E2 cannot be set to “L” at the same time when displayed data is written or read out.
Status reading in a reset operation is invalidated at the time the serial interface is selected. However, “H” is
output to the D2 pin (SD0: serial data output pin).
Serial clock wiring must be made by considering external noise and reflecting noise. Be sure to check the
operation of the equipment.
A0
RWX
D0 (SDI)
D2 (SDO)
0
0
1
1
0
1
0
1
Command write
Invalid
Data write
Invalid
Status read
Status read
Status read
Data read (Note)
A0
R / WX
Operation
L
H
L
H
L
H
H
L
Command input
Displayed data reading
Status reading
Displayed data writing
Figure 6 Read/Write Timings of Serial Interface Display Data
D0
D1
D2
D3
D4
D5
D6
D7
A0
R/WX
D1
(SCLK)
D0
(SDI)
E1, E2
D0
D1
D2
D3
D4
D5
D6
D7
D2
(SDO)
Note: Data reading needs dummy reading.
D0
D0
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