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H8S/2240 数据表(PDF) 536 Page - Renesas Technology Corp |
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H8S/2240 数据表(HTML) 536 Page - Renesas Technology Corp |
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536 / 818 page ![]() 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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