h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 560

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 14 Smart Card Interface
Thus the reception margin in asynchronous mode is given by the following formula.
Formula for reception margin in smart card interface mode
Where M: Reception margin (%)
Assuming values of F = 0, D = 0.5 and N = 372 in the above formula, the reception margin
formula is as follows.
When D = 0.5 and F = 0,
Rev. 5.00 Sep 22, 2005 page 534 of 1136
REJ09B0257-0500
N: Ratio of bit rate to clock (N = 32, 64, 372, and 256)
D: Clock duty (D = 0 to 1.0)
L: Frame length (L = 10)
F: Absolute value of clock frequency deviation
M = (0.5 – 1/2 × 372) × 100%
M = (0.5 –
= 49.866%
2N
1
) – (L – 0.5) F –
 D – 0.5
N
(1 + F) × 100%