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7641 Datasheet(PDF) 197 Page - Renesas Technology Corp

Part # 7641
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  385 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7641 Datasheet(HTML) 197 Page - Renesas Technology Corp

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Rev.2.00
Aug 28, 2006
page 66 of 148
7641 Group
REJ09B0336-0200
APPLICATION
2.4 UART
Fig. 2.4.13 Connection diagram
Specifications : •Transmitter: UART1 is used.
•Receiver: UART2 is used.
• Transfer bit rate : 9600 bps (
φ = f(XIN)/4 = 4 MHz divided by 416)
• Data format: 1ST-9DATA-2ST
•Use of CTS and RTS functions
• 2-byte data is transferred from the transmitting side to the receiving side at intervals
of 10 ms generated by the timer.
Fig. 2.4.14 Timing chart
2.4.6 UART application example
(1)
Data output (control of peripheral IC)
Outline : Data is transmitted and received, using the UART.
Figure 2.4.13 shows a connection diagram, and Figure 2.4.14 shows a timing chart.
P80/UTXD2/SRDY
P81/URXD2/URXD2
RTS2
P84/UTXD1
P85/URXD1
P86/CTS1
Transmitting side
7641 group
(UART1 use)
Receiving side
7641 group
(UART2 use)
P84/UTXD1
ST D0 D1 D2 D3 D4 D5 D6 D7 SP(2) ST D0 D1 D2 D3 D4 D5 D6 D7 SP(2)
ST D0
10 ms
P86/CTS1
•••



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