SH7760 Datasheet, PDF (678/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

(3) Serial data reception
An example of data reception processing in smart card mode is shown in figure 18.6.
Initialization
(1)
(1) Follow the procedure of item 1 in section 18.4.4,
and initialize the smart card interface.
Start reception
No
PER=0&&ORER=0
(2)
&&WAIT_ER=0?
Yes
(2) Confirm that the PER, ORER, and WAIT_ER flags
in SISSR are 0. If one of these flags is set, after
performing the prescribed reception error
processing, clear the PER, ORER, and WAIT_ER
flags to 0.
(3) ^{Repeat (2) and (3) in the figure until it can be}
confirmed that the RDRF flag is set to 1.
Error processing
No
(4) Read received data from SIRDR.
RDRF=1?
Yes
(3)
(5) When performing continuous data reception,
return to step (2).
(6) _{When reception is ended, clear the RE bit to 0.}
Read received data from SIRDR
(4)
No
All data received?
(5)
Note: If during reception a parity error occurs and
PER is set to 1, in T=0 mode the received data
is not transferred to SIRDR, and so this data
cannot be read.
Yes
Clear RE bit in SISCR to 0
(6)
Reception end
Figure 18.6 Example of Reception Processing
Rev. 1.0,02/03, page 628 of 1294