Section 15 Smart Card Interface
Rev. 5.00 May 29, 2006 page 438 of 698
REJ09B0146-0500
0
185
371 0
185
371 0
Base clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
186 clock cycles
372 clock cycles
Start
bit
D0
D1
Figure 15.8 Receive Data Sampling Timing in Smart Card Mode
The receive margin is found from the following equation:
For smart card mode:
M = (0.5 – )
1
2N
D – 0.5
N
– (L – 0.5)F – (1 + F)
×
100%
Where: M
=
Receive margin (%)
N
=
Ratio of bit rate to clock (N
=
372)
D
=
Clock duty (D
=
0 to 1.0)
L
=
Frame length (L
=
10)
F
=
Absolute value of clock frequency deviation
Using this equation, the receive margin when F
=
0 and D
=
0.5 is as follows:
When D = 0.5 and F = 0:
M
=
(0.5 – 1/2
×
372)
×
100
%
=
49.866
%
Summary of Contents for SH7706 Series
Page 8: ...Rev 5 00 May 29 2006 page viii of xlviii ...
Page 160: ...Section 5 Cache Rev 5 00 May 29 2006 page 112 of 698 REJ09B0146 0500 ...
Page 370: ...Section 11 Watchdog Timer WDT Rev 5 00 May 29 2006 page 322 of 698 REJ09B0146 0500 ...
Page 554: ...Section 17 Pin Function Controller PFC Rev 5 00 May 29 2006 page 506 of 698 REJ09B0146 0500 ...
Page 576: ...Section 18 I O Ports Rev 5 00 May 29 2006 page 528 of 698 REJ09B0146 0500 ...
Page 746: ...Index Rev 5 00 May 29 2006 page 698 of 698 REJ09B0146 0500 ...
Page 749: ...SH7706 Group Hardware Manual ...