HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 1082

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 30
30.5
The following matters should be noted when using the smart card interface.
(1)
When SCSMPL holds its initial value, the smart card interface operates at a basic clock frequency
372 times the transfer rate.
During reception, the smart card interface samples the falling edge of the start bit using the serial
clock for internal synchronization. Receive data is captured internally at the rising edge of the
186th serial clock pulse. This is shown in figure 30.7.
Rev. 3.00 Jan. 18, 2008 Page 1020 of 1458
REJ09B0033-0300
Synchronization
sampling timing
Received data
Data sampling
timing
Receive Data Timing and Receive Margin
Basic clock
(RXD)
Usage Notes
SIM Card Module (SIM)
Figure 30.7
0
186 clock pulses
Start bit
372 clock pulses
Receive Data Sampling Timing in Smart Card Mode
185
371
0
D0
185
371
0
D1