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7721 Datasheet(PDF) 244 Page - Renesas Technology Corp

Part # 7721
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7721 Datasheet(HTML) 244 Page - Renesas Technology Corp

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7721 Group User’s Manual
11–41
SERIAL I/O
11.4 Clock asynchronous serial I/O (UART) mode
11.4.5 Method of reception
Figure 11.4.9 shows an initial setting example for relevant registers when receiving. Reception is started
when all of the following conditions (Œ and ) are satisfied:
Œ Reception is enabled (receive enable bit = “1”).
 The start bit is detected.
____
____
By connecting the RTSi pin (receiver side) and CTSi pin (transmitter side), the timing of transmission and
that of reception can be matched. For details, refer to section “11.4.6 Receive operation.”
When using interrupts, it is necessary to set the relevant registers to enable interrupts. For details, refer
to “CHAPTER 7. INTERRUPTS.”
Figure 11.4.10 shows processing after receive completion.



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