HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 715

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

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 15.6 Examples of BRR Settings for Bit Rate B (bits/s) (When n = 0 and S = 372)
Bits/s
9600
Table 15.7 Maximum Bit Rate at 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 formula:
N
0
N =
Error (%) = (
7.1424
Error N
0.00
(When S = 372)
S × 2
1
10.00
2n+1
φ
Error N
30
S × 2
Maximum Bit Rate (bits/s)
9600
13441
14400
17473
19200
21505
24194
26882
33602
× B
1
2n+1
10.7136
× 10
Error N
25
× B × (N + 1)
φ
6
– 1
1
13.00
Error N
8.99
× 10
1
14.2848
φ (MHz)
0.00
Error N
6
– 1) × 100
Rev.6.00 Sep. 27, 2007 Page 685 of 1268
1
16.00
N
0
0
0
0
0
0
0
0
0
Error N
12.01 2
Section 15 Smart Card Interface
18.00
Error N
15.99 2
REJ09B0220-0600
n
0
0
0
0
0
0
0
0
0
20.00
Error N
6.60
3
25.00
Error
12.49