678
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.
N =
ø
S
×
2
2n+1
×
B
×
10
6
– 1
Table 17-6 Examples of BRR Settings for Bit Rate B (bit/s) (When n = 0 and S = 372)
ø (MHz)
7.1424
10.00
10.7136
13.00
14.2848
16.00
18.00
20.00
25.00
bit/s
N
Error N
Error N
Error N
Error N
Error N
Error
N
Error
N
Error N
Error
9600
0
0.00
1
30
1
25
1
8.99
1
0.00
1
12.01
2
15.99
2
6.60
3
12.49
Table 17-7 Maximum Bit Rate at Various Frequencies (Smart Card Interface Mode)
(when S = 372)
ø (MHz)
Maximum Bit Rate (bit/s)
N
n
7.1424
9600
0
0
10.00
13441
0
0
10.7136
14400
0
0
13.00
17473
0
0
14.2848
19200
0
0
16.00
21505
0
0
18.00
24194
0
0
20.00
26882
0
0
25.00
33602
0
0
The bit rate error is given by the following formula:
Error (%) = (
ø
S
×
2
2n+1
×
B
×
(N + 1)
×
10
6
– 1)
×
100
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...