HD6432345 Datasheet, PDF (508/907 Pages) Hitachi Semiconductor – H8S/2345 F-ZTAT Hardware Manual

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.
Start
Initialization
Start reception
ORER = 0 and
No
PER = 0
Yes
No
RDRF=1?
Yes
Read RDR and clear
RDRF flag in SSR to 0
Error processing
No
All data received?
Yes
Clear RE bit to 0
Figure 13.7 Example of Reception Processing Flow
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