Z8F6421PM020SC Datasheet, PDF (137/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
117
Table 60. UART Baud Rates
20.0 MHz System Clock
Desired Rate BRG Divisor
(kHz)
1250.0
625.0
250.0
(Decimal)
1
2
5
115.2
11
57.6
22
38.4
33
19.2
65
9.60
130
4.80
260
2.40
521
1.20
1042
0.60
2083
0.30
4167
16.667 MHz System Clock
Desired Rate BRG Divisor
(kHz)
1250.0
625.0
(Decimal)
1
2
250.0
4
115.2
9
57.6
18
38.4
27
19.2
54
9.60
109
4.80
217
2.40
434
1.20
868
0.60
1736
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
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
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
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
18.432 MHz System Clock
Desired Rate BRG Divisor Actual Rate Error
(kHz)
1250.0
625.0
250.0
(Decimal)
1
2
5
(kHz)
1152.0
576.0
230.4
(%)
-7.84%
-7.84%
-7.84%
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
10
20
30
60
120
240
480
960
1920
115.2
0.00
57.6
0.00
38.4
0.00
19.2
0.00
9.60
0.00
4.80
0.00
2.40
0.00
1.20
0.00
0.60
0.00
0.30
3840
0.30
0.00
11.0592 MHz System Clock
Desired Rate BRG Divisor Actual Rate Error
(kHz)
1250.0
625.0
(Decimal)
N/A
1
(kHz)
N/A
691.2
(%)
N/A
10.59
250.0
3
230.4
-7.84
115.2
6
115.2
0.00
57.6
12
57.6
0.00
38.4
18
38.4
0.00
19.2
36
19.2
0.00
9.60
72
9.60
0.00
4.80
144
4.80
0.00
2.40
288
2.40
0.00
1.20
576
1.20
0.00
0.60
1152
0.60
0.00
PS019915-1005
UART