HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 508

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

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
[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.
494
appropriate receive error processing, then clear both the ORER and the PER flag to 0.
No
No
Figure 13.7 Example of Reception Processing Flow
RDRF flag in SSR to 0
Read RDR and clear
All data received?
Clear RE bit to 0
ORER = 0 and
Start reception
Initialization
RDRF=1?
PER = 0
Start
Yes
Yes
Yes
No
Error processing