參數(shù)資料
型號: 37C672
廠商: SMSC Corporation
英文描述: ENHANCED SUPER I/O CONTROLLER WITH FAST IR
中文描述: 增強的超級I / O控制器,快速紅外線
文件頁數(shù): 169/173頁
文件大?。?/td> 965K
代理商: 37C672
2-38
3802 GROUP USER’S MANUAL
APPLICATION
2.3 Serial I/O
(2) Output of serial data (control of a peripheral IC)
Outline : 4-byte data is transmitted and received through the clock synchronous serial I/O. The CS
signal is output to a peripheral IC through the port P53.
Fig. 2.3.23 Connection diagram [Output of serial data]
P53
SCLK1
TXD
CS
Peripheral IC
3802 group
(1) Example for using Serial I/O1
(2) Example for using Serial I/O2
DATA
CS
CLK
P53
SCLK2
SOUT2
Peripheral IC
3802 group
DATA
CS
CLK
DATA
CS
CLK
DATA
Specifications : The Serial I/O is used. (clock synchronous serial I/O is selected)
Synchronous clock frequency : 125 kHz (f(X IN) = 4 MHz is divided by 32)
Transfer direction : LSB first
The Serial I/O interrupt is not used.
___
The Port P53 is connected to the CS pin (“L” active) of the peripheral IC for a
transmission control (the output level of the port P53 is controlled by software).
Figre 2.3.24 shows an output timing chart of serial data.
Fig. 2.3.24 Timing chart [Output of serial data]
CS
DO0
DO1
DO2
DO3
CLK
DATA
Note: The SOUT2 pin is in high impedance after completing to transfer data, using the serial I/O2
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