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7630 Datasheet(PDF) 151 Page - Renesas Technology Corp

Part # 7630
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  238 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7630 Datasheet(HTML) 151 Page - Renesas Technology Corp

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2-85
7630 Group User’s Manual
APPLICATION
2.5 Serial I/O
(3) Communication (transmit/receive) using asynchronous serial I/O (UART) 2
Point : 9-bit data is transmitted and received through asynchronous serial I/O.
Figure 2.5.24 shows a connection diagram, and Figure 2.5.25 shows a timing chart.
Fig. 2.5.24 Connection diagram [Communication using UART]
Fig. 2.5.25 Timing chart [Communication using UART]
RxD
7630 group
TxD
UCTS
URTS
7630 group
Transmitting side
Receiving side
TxD
ST
D0
D1
D2
D5
D6
D8
2SP
URTS
Receive enable bit
Transmit enable bit
Transmission register empty flag
UCTS
(Transmitting side)
RxD
(Receiving side)
• Receiving side
• Transmitting side
Set to “1”
Set to “1”
A
A : 9 bits data written to the UART transmit buffer registers is transferred to the Transfer shift register.
D7
1ST-9DATA-2SP
D3
D4
Initialize to “0”
Initialize to “0”
Specifications :
• The Serial I/O is used (UART is selected).
• Transfer bit rate : 9600 bps (f(XIN) = 10.0 MHz is divided by 1024)
_________
_________
• Communication control using port URTS and UCTS



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