Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
Z8 Encore!
®
93
Table 58. UART Baud Rates
20.0 MHz System Clock
Desired Rate
(kHz)
1250.0
625.0
250.0
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
BRG Divisor
(Decimal)
1
2
5
11
22
33
65
130
260
521
1042
2083
4167
Actual Rate
(kHz)
1250.0
625.0
250.0
113.6
56.8
37.9
19.2
9.62
4.81
2.40
1.20
0.60
0.30
Error
(%)
0.00
0.00
0.00
-1.36
-1.36
-1.36
0.16
0.16
0.16
-0.03
-0.03
0.02
-0.01
18.432 MHz System Clock
Desired Rate
(kHz)
1250.0
625.0
250.0
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
BRG Divisor
(Decimal)
1
2
5
10
20
30
60
120
240
480
960
1920
3840
Actual Rate
(kHz)
1152.0
576.0
230.4
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
Error
(%)
-7.84%
-7.84%
-7.84%
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.667 MHz System Clock
Desired Rate
(kHz)
1250.0
625.0
250.0
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
BRG Divisor
(Decimal)
1
2
4
9
18
27
54
109
217
434
868
1736
3472
Actual Rate
(kHz)
1041.69
520.8
260.4
115.7
57.87
38.6
19.3
9.56
4.80
2.40
1.20
0.60
0.30
Error
(%)
-16.67
-16.67
4.17
0.47
0.47
0.47
0.47
-0.45
-0.83
0.01
0.01
0.01
0.01
11.0592 MHz System Clock
Desired Rate
(kHz)
1250.0
625.0
250.0
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
BRG Divisor
(Decimal)
N/A
1
3
6
12
18
36
72
144
288
576
1152
2304
Actual Rate
(kHz)
N/A
691.2
230.4
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
Error
(%)
N/A
10.59
-7.84
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
PS017610-0404
UART
ZILOG [ ZILOG, INC. ]
