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H8/3021 Datasheet(PDF) 409 Page - Renesas Technology Corp

Part # H8/3021
Description  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3021 Datasheet(HTML) 409 Page - Renesas Technology Corp

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11. Serial Communication Interface
Rev.2.00 Mar. 22, 2007 Page 385 of 684
REJ09B0352-0200
Figure 11.19 shows an example of SCI receive operation.
Serial clock
Serial data
Bit 7
Bit 0
Bit 7
Bit 0
Bit 1
Bit 6
Bit 7
RXI
request
RDRF
ORER
RXI interrupt handler
reads data in RDR and
clears RDRF flag to 0
RXI
request
Overrun error,
ERI request
1 frame
Figure 11.19 Example of SCI Receive Operation
Transmitting and Receiving Serial Data Simultaneously (Synchronous Mode): Figure 11.20
shows a sample flowchart for transmitting and receiving serial data simultaneously and indicates
the procedure to follow.



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