h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 549

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

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 14.6 Examples of BRR Settings for Bit Rate B (bit/s) (When n = 0 and S = 372)
Table 14.7 Maximum Bit Rate at Various Frequencies (Smart Card Interface Mode)
The bit rate error is given by the following formula:
bit/s
9600
φ φ φ φ (MHz)
7.1424
10.00
10.7136
13.00
14.2848
16.00
18.00
20.00
N
0
N =
Error (%) = (
7.1424
0.00
Error
(When S = 372)
S × 2
1
2n+1
N
φ
10.00
× B
Error
30
S × 2
Maximum Bit Rate (bit/s)
9600
13441
14400
17473
19200
21505
24194
26882
2n+1
× 10
N
1
× B × (N + 1)
10.7136
6
φ
– 1
Error
25
N
1
13.00
Error
8.99
× 10
φ φ φ φ
(MHz)
6
1
N
– 1) × 100
Rev. 5.00 Sep 22, 2005 page 523 of 1136
14.2848
Error
0.00
N
0
0
0
0
0
0
0
0
Section 14 Smart Card Interface
N
1
16.00
Error
12.01
N
2
REJ09B0257-0500
18.00
n
0
0
0
0
0
0
0
0
Error
15.99
N
2
20.00
Error
6.60