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7630 Datasheet(PDF) 145 Page - Renesas Technology Corp |
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7630 Datasheet(HTML) 145 Page - Renesas Technology Corp |
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145 / 238 page  2-79 7630 Group User’s Manual APPLICATION 2.5 Serial I/O (2) Communication (transmit/receive) using asynchronous serial I/O (UART) 1 Point : 1-word data is transmitted and received through asynchronous serial I/O. Figure 2.5.18 shows a connection diagram, and Figure 2.5.19 shows a timing chart. Fig. 2.5.18 Connection diagram [Communication using UART] 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 Fig. 2.5.19 Timing chart [Communication using UART] RxD 7630 group TxD UCTS URTS 7630 group Transmitting side Receiving side TxD ST D0 D1 D2 D3 D4 D5 D6 D7 2SP URTS ST D0 Receive enable bit Transmit enable bit Transmission buffer empty flag UCTS (Transmitting side) RxD (Receiving side) • Receiving side • Transmitting side Set to “1” Set to “1” A A A : Write transmit data to the UART transmit buffer register 1. 1ST-8DATA-2SP |
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