参数资料
型号: M38004E8SS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP64
封装: 0.750 INCH, 1.78 MM PITCH, WINDOWED, CERAMIC, SDIP-64
文件页数: 159/174页
文件大小: 1752K
代理商: M38004E8SS
2-36
3800 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. 2.3.19 Connection diagram [Output of serial data]
Specifications : The Serial I/O is used. (clock synchronous serial I/O is selected)
Synchronous clock frequency : 125 kHz (f(XIN) = 4 MHz is divided by 32)
Transfer direction : LSB first
The Serial I/O1 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 2.3.20 shows an output timing chart of serial data.
Fig. 2.3.20 Timing chart [Output of serial data]
P53
SCLK
TXD
CS
Peripheral IC
3800 group
DATA
CS
CLK
DATA
CS
DO0
DO1
DO2
DO3
CLK
DATA
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