H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 672

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 14 Smart Card Interface
Thus the reception margin in asynchronous mode is given by the following formula.
Where M: Reception margin (%)
Assuming values of F = 0 and D = 0.5 in the above formula, the reception margin formula is as
follows.
When D = 0.5 and F = 0,
Rev. 3.00 Sep 15, 2006 page 638 of 988
REJ09B0330-0300
Internal
basic
clock
Receive
data (RxD)
Synchro-
nization
sampling
timing
Data
sampling
timing
M = (0.5 – 1/2
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
M = | (0.5 –
= 49.866%
Figure 14.10 Receive Data Sampling Timing in Smart Card Mode
0
186 clocks
2N
185
1
372 clocks
372)
Start bit
) – (L – 0.5) F –
100%
371
0
| D – 0.5 |
D0
N
(1 + F) | 100%
185
371 0
D1