HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 450

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

13. Smart Card Interface
13.4
The following points should be noted when using the SCI as a smart card interface.
Receive Data Sampling Timing and Receive Margin in Smart Card Interface Mode: In smart
card interface mode, the SCI operates on a base clock with a frequency of 372 times the transfer
rate. In reception, the SCI synchronizes internally with the fall of the start bit, which it samples on
the base clock. Receive data is latched at the rising edge of the 186th base clock pulse. The timing
is shown in figure 13.11.
Rev.4.00 Aug. 20, 2007 Page 406 of 638
REJ09B0395-0400
Internal base
clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
Figure 13.11 Receive Data Sampling Timing in Smart Card Interface Mode
Usage Notes
0
186 clocks
185
372 clocks
Start bit
371
0
D0
185
371 0
D1