HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 1076
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 30
(2)
Data transmission in smart card mode includes error signal sampling and retransmit processing.
An example of transmit processing is shown in figure 30.5.
Step (1) to step (6) of figure 30.5 correspond to the following operation.
1. Follow the initialization procedure above to initialize the smart card interface.
2. Confirm that the ERS bit (error flag) in SCSSR is cleared to 0.
3. Repeat steps (2) and (3) until it can be confirmed that the TDRE flag in SCSSR is set to 1.
4. Write transmit data to SCTDR, and perform transmission. At this time, the TDRE flag is
5. When performing continuous data transmission, return to step (2).
6. When transmission is ended, clear the TE bit to 0.
Interrupt processing can be performed in the above series of processing.
When the TIE bit is set to 1 to enable interrupt requests and if transmission is started and the
TDRE flag is set to 1, a transmit data empty interrupt (TXI) request is issued. When the RIE bit is
set to 1 to enable interrupt requests and if an error occurs during transmission and the ERS flag is
set to 1, a transmit/receive error interrupt (ERI) request is issued.
For details, refer to Interrupt Operations in section 30.4.5, Data Transmit/Receive Operation.
Rev. 3.00 Jan. 18, 2008 Page 1014 of 1458
REJ09B0033-0300
automatically cleared to 0. When transmission of the start bit is started, the TEND flag is
automatically cleared to 0, and the TDRE flag is automatically set to 1.
Serial Data Transmission
SIM Card Module (SIM)
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