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參數(shù)資料
| 型號： | S-4544A |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | LCD Controller-Driver With Built-in 8-Bit and Serial Interfaces(內(nèi)置8位和串行接口的LCD控制器-驅(qū)動器) |
| 中文描述： | LCD控制器與- 8內(nèi)置驅(qū)動器位和串行接口（內(nèi)置8位和串行接口的液晶顯示控制器-驅(qū)動器） |
| 文件頁數(shù)： | 11/39頁 |
| 文件大?。?/td> | 237K |
| 代理商： | S-4544A |
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LCD Controller-Driver
S-4544A
10
Seiko Instruments Inc.
3.MPU Interface Select
In the S-4544A, the parallel interface or the serial interface can be selected.
Table 8 Interface Selection
P/SX Pin Logic
C86 Pin Logic
L
H
MPU Interface
80-family Interface
68-family Interface
H
L
don't care
Serial Interface
3.1 Parallel Interface
3.2 Serial Interface
P/SX
CSX
R/WX
A0
D0
D1
D2
D3 to D7
RDX
C86
By setting P/SX to “L.” the serial interface is selected. The instruction code is the same as for the parallel
interface. In this case, the RDX pin should be “Open.”
By setting CSX to “H,” the serial interface circuit is reset and the counter is initialized. By setting CSX to “L,” the
serial interface circuit enters an operating state.
The commands and displayed data are written at the rising edge of the 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.
: “L” Serial interface
: “L” Chip Active
: “L” WRITE Command
: “L” Command Data
: Serial Data Input
: Serial Clock Input
: Serial Data Output
: Open
: Open
: Open
“H” Parallel Interface
“H” Chip Reset
“H” READ Command
“H” Display Data
(SDI)
(SCLK)
(SDO)
When the serial interface is selected, the D2 pin (SDO: Serial Data Output Pin) goes
“
H
”
during reset.
Status reading in a reset operation is invalidated when the serial interface is selected. However,
“
H
”
is output to the
D2 pin (SDO: 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.
4. Command Execution Time
The command is completely executed within the cycle time (tcyc) according to the timing characteristics of the
command input. Therefore, commands can be input continuously without confirming the busy flag at the Status
Read mode. Reinputting the command within the cycle time is inhibited.
S-4544A Pin Name
A0
RDX
R/WX
CSX
D0 to D7
68-Family MPU Signal Name
A0
E
R/W
CS
D0 to D7
80-Family MPU Signal Name
A0
RD
WR
CS
D0 to D7
Table 9 Connection Relationship between MPU and Pins
A0
R/WX
Operation
L
H
L
H
L
H
H
L
Inputs the command
Reads the display data
Reads the status
Writes the display data
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