HD6475348R Datasheet, PDF (281/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

Table 14-3 Examples of BRR Settings in Asynchronous Mode (4)
Bit
Rate n
110 2
150 2
300 1
600 1
1200 0
2400 0
4800 0
9600 0
19200 0
31250 —
38400 0
14.7456
Error
N (%)
130 –0.07
95 0
191 0
95 0
191 0
95 0
47 0
23 0
11 0
——
50
XTAL Frequency (MHz)
16
19.6608
20
Error
Error
Error
n N (%) n N (%)
n N (%)
2 141 +0.03 2 174 –0.26 3 43 +0.88
2 103 +0.16 2 127 0
2 129 +0.16
1 207 +0.16 1 255 0
2 64 +0.16
1 103 +0.16 1 127 0
1 129 +0.16
0 207 +0.16 0 255 0
1 64 +0.16
0 103 +0.16 0 127 0
0 129 +0.16
0 51 +0.16 0 63 0
0 64 +0.16
0 25 +0.16 0 31 0
0 32 –1.36
0 12 +0.16 0 15 0
0 15 +1.73
07
0
09
–1.70 0 9
0
—— —
07 0
07
+1.73
Bit
Rate
110
150
300
600
1200
2400
4800
9600
19200
31250
38400
XTAL Frequency (MHz)
24
24.576
28
29.4912
32
Error
Error
Error
Error
Error
n N (%) n N (%) n N (%) n N (%) n N (%)
2 212 0.03 2 217 0.08 2 248 –0.17 3 64 0.70 3 70 0.03
2 155 0.16 2 159 0.00 2 181 0.16 2 191 0.00 2 207 0.16
2 77 0.16 2 79 0.00 2 90 0.16 2 95 0.00 2 103 0.16
1 155 0.16 1 159 0.00 1 181 0.16 1 191 0.00 1 207 0.16
1 77 0.16 1 79 0.00 1 90 0.16 1 95 0.00 1 103 0.16
0 155 0.16 0 159 0.00 0 181 0.16 0 191 0.00 0 207 0.16
0 77 0.16 0 79 0.00 0 90 0.16 0 95 0.00 0 103 0.16
0 38 0.16 0 39 0.00 0 45 –0.93 0 47 0.00 0 51 0.16
0 19 –2.34 0 19 0.00 0 22 –0.93 0 23 0.00 0 25 0.16
0 11 0.00 0 11 2.40 0 13 0.00 0 14 –1.70 0 15 0.00
0 9 –2.34 0 9 0.00 0 10 3.57 0 11 0.00 0 12 0.16
Note: If possible, select a setting such that the error is 1% or less.
B = OSC × 106/[64 × 22n × (N + 1)]
B:
N:
OSC :
n:
Bit rate
BRR value (0 ≤ N ≤ 255)
Crystal oscillator frequency in MHz
Internal clock source (0, 1, 2, or 3)
267