Table 13.6 Brr Settings For Typical Bit Rates (Bits/S) (When N = 0); Table 13.7 Maximum Bit Rates For Various Frequencies (Smart Card Interface Mode) - Hitachi H8/3062 Hardware Manual

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.
N =
1488 × 2

Table 13.6 BRR Settings for Typical Bit Rates (bits/s) (When n = 0)

7.1424
bit/s N Error N Error
9600 0 0.00 1 30

Table 13.7 Maximum Bit Rates for Various Frequencies (Smart Card Interface Mode)

φ φ φ φ (MHz)
Maximum Bit Rate (bits/s)
7.1424 9600
10.00 13441
10.7136 14400
13.00 17473
14.2848 19200
16.00 21505
18.00 24194
20.00 26882
25.00 33602
The bit rate error is given by the following equation:
Error (%) =
φ
× 10
6
– 1
× B
2n–1
10.00 10.7136
N Error N Error
1 25 1 8.99
φ
1488 × 2 × B × (N + 1)
2n-1
φ φ φ φ (MHz)
13.00 14.2848
N Error N Error
1 0.00 1 12.01
N
0
0
0
0
0
0
0
0
0
× 10 × 100
6
– 1
16.00 18.00
N Error
2 15.99
n
0
0
0
0
0
0
0
0
0
25.0
N Error
3 12.49
435