HD6432351 datasheet(666/1025 Pages) RENESAS

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Section 14 Smart Card Interface

Rev. 3.00 Sep 15, 2006 page 632 of 988

REJ09B0330-0300

Serial Data Reception

Data reception in Smart Card mode uses the same processing procedure as for the normal SCI.

Figure 14.7 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

Yes

ORER = 0 and

PER = 0

RDRF = 1?

All data received?

Yes

Figure 14.7 Example of Reception Processing Flow

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