HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 441

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

The following equation calculates the bit rate register (BRR) setting from the operating frequency
and bit rate. N is an integer from 0 to 255, specifying the value with the smaller error.
Table 13.6 BRR Settings for Typical Bit Rates (bits/s) (When n = 0)
9600
Table 13.7 Maximum Bit Rates for Various Frequencies (Smart Card Interface Mode)
φ (MHz)
7.1424
10.00
10.7136
13.00
14.2848
16.00
18.00
20.00
25.00
The bit rate error is given by the following equation:
bit/s
0 0.00
N Error
N =
Error (%) =
7.1424
1488 × 2
1 30
N Error
10.00
Maximum Bit Rate (bits/s)
9600
13441
14400
17473
19200
21505
24194
26882
33602
φ
1488 × 2
2n−1
× B
1 25
10.7136
N Error
2n−1
× 10
φ
× B × (N + 1)
6
1 8.99
N Error
− 1
13.00
1 0.00
14.2848
N Error
φ (MHz)
× 10
6
Rev.4.00 Aug. 20, 2007 Page 397 of 638
− 1
1 12.01
N
0
0
0
0
0
0
0
0
0
N Error
16.00
× 100
2 15.99
N Error
18.00
13. Smart Card Interface
n
0
0
0
0
0
0
0
0
0
REJ09B0395-0400
2 6.66
N Error
20.00
3 12.49
N Error
25.00