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H8S2245 데이터시트(PDF) 536 Page - Renesas Technology Corp

부품명 H8S2245
상세설명  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
PDF  818 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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Section 13 Smart Card Interface
Rev.3.00 Mar. 26, 2007 Page 494 of 772
REJ09B0355-0300
Serial Data Reception
Data reception in Smart Card mode uses the same processing procedure as for the normal SCI.
Figure 13.7 shows an example of the transmission processing flow.
[1] Perform Smart Card interface mode initialization as described above in Initialization.
[2] Check that the ORER flag and PER flag in SSR are cleared to 0. If either is set, perform the
appropriate receive error processing, then clear both the ORER and the PER flag to 0.
[3] Repeat steps [2] and [3] until it can be confirmed that the RDRF flag is set to 1.
[4] Read the receive data from RDR.
[5] When receiving data continuously, clear the RDRF flag to 0 and go back to step [2].
[6] To end reception, clear the RE bit to 0.
Initialization
Read RDR and clear
RDRF flag in SSR to 0
Clear RE bit to 0
Start reception
Start
Error processing
No
No
No
Yes
Yes
ORER = 0 and
PER = 0?
RDRF = 1?
All data received?
Yes
Figure 13.7 Example of Reception Processing Flow
With the above processing, interrupt servicing or data transfer by the or DTC is possible.



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