HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 521

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HD6433045

Manufacturer Part Number
HD6433045
Description
Hitachi Single-Chip Microcomputer
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet

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The following equation calculates the bit rate register (BRR) setting from the system clock
frequency and bit rate. N is an integer from 0 to 255, specifying the value with the smaller error.
N =
Table 14-6 BRR Settings for Typical Bit Rate (bits/s) (when n = 0)
Bit/s
9600 0
Table 14-7 Maximum Bit Rates for Various Frequencies (Smart Card Interface)
ø (MHz)
7.1424
10
10.7136
13
14.2848
16
18
The bit rate error is calculated from the following equation.
Error (%) =
1488 2
N
7.1424
Maximum Bit Rate (bits/s)
9600
13441
14400
17473
19200
21505
24194
Error
0.00
ø
2n–1
1488 2
N
1
B
10.00
2n – 1
Error
30.00
10
ø
6
– 1
B (N + 1)
N
1
10.7136
Error
25.00
N
0
0
0
0
0
0
0
10
N
1
511
6
ø (MHz)
13.00
–1
Error
8.99
100
N
1
14.2848
Error
0.00
n
0
0
0
0
0
0
0
N
1
16.00
Error
12.01
N
2
18.00
Error
15.99

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