HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 503

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

The method of calculating the value to be set in the bit rate register (BRR) from the operating
frequency and bit rate, on the other hand, is shown below. N is an integer, 0 N 255, and the
smaller error is specified.
Table 13.6 Examples of BRR Settings for Bit Rate B (bit/s) (When n = 0)
bit/s
9600
Table 13.7 Maximum Bit Rate at Various Frequencies (Smart Card Interface Mode)
ø (MHz)
7.1424
10.00
10.7136
13.00
14.2848
16.00
18.00
20.00
The bit rate error is given by the following formula:
N =
Error (%) =
N Error N Error N Error N Error N Error N Error N Error N Error
0
7.1424
0.00
1488
1
2
1488
2n–1
10.00
Maximum Bit Rate (bit/s)
9600
13441
14400
17473
19200
21505
24194
26882
30
B
2
2n-1
1
10.7136
10
25
B
6
– 1
(N + 1)
1
13.00
8.99
ø (MHz)
10
1
14.2848
6
– 1
0.00
N
0
0
0
0
0
0
0
0
100
1
16.00
12.01 2
18.00
n
0
0
0
0
0
0
0
0
15.99 2
20.00
6.60
489