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: 167/174页
文件大小: 1752K
代理商: M38004E8SS
APPLICATION
2.3 Serial I/O
2-43
3800 GROUP USER’S MANUAL
(4) Communication (transmit/receive) using an asynchronous serial I/O (UART)
Point : 2-byte data is transmitted and received through an asynchronous serial I/O.
The port P40 is used for communication control.
Figure 2.3.29 shows a connection diagram, and Figure 2.3.30 shows a timing chart.
Fig. 2.3.29 Connection diagram [Communication using UART]
Specifications : The Serial I/O is used (UART is selected).
Transfer bit rate : 9600 bps (f(XIN) = 4.9152 MHz is divided by 512)
Communication control using port P40
(The output level of the port P40 is controlled by softoware.)
2-byte data is transferred from the transmitting side to the receiving side at inter-
vals of 10 ms (generated by timer).
Fig. 2.3.30 Timing chart [Communication using UART]
Transmitting side
P40
3800 group
P40
3800 group
Receiving side
TXD
X
D
P40
TXD
10 ms
D0
D1 D2
D3
D4
D5 D6
D7
ST
SP(2)
D0
D1
D2 D3
D4
D5 D6
D7
ST
SP(2)
D0
ST
R
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