Z8FMC16100 Datasheet, PDF (164/402 Pages) Zilog, Inc. – Z8 Encore-R Motor Control Flash MCUs

Z8 Encore!^® Motor Control Flash MCUs
Product Specification
142
The baud rate error relative to the appropriate baud rate is calculated using the following
equation:
UART
Baud
Rate
Error (%)
=
100 ×


-A---c----t-u----a---l---D----a---D-t-a---e--R-s---i-ar--e-t--e-d---^–--D---D-a---te--a--s---iR-r--e-a--d--t-e--D-----a---t--a-----R----a---t--e--_
For reliable communication, the LIN-UART baud rate error must never exceed 5 percent.
Tables 78 through 82 provide error data for popular baud rates and commonly-used crystal
oscillator frequencies for normal UART modes of operation.
Table 78. LIN-UART Baud Rates, 20.0 MHz System Clock
Applicable
Rate (kHz)
1250.0
625.0
250.0
115.2
57.6
38.4
19.2
BRG
Divisor Actual Rate Error(
(Decimal) (kHz)
%)
1
1250.0 0.00
2
625.0
0.00
5
250.0
0.00
11
113.64 –1.19
22
56.82 –1.36
33
37.88 –1.36
65
19.23
0.16
Applicable
Rate (kHz)
9.60
4.80
2.40
1.20
0.60
0.30
BRG
Divisor Actual Rate Error(
(Decimal) (kHz)
%)
130
9.62
0.16
260
4.81
0.16
521
2.399 –0.03
1042
1.199 –0.03
2083
0.60
0.02
4167
0.299 –0.01
Table 79. LIN-UART Baud Rates, 10.0 MHz System Clock
BRG
Applicable Divisor Actual Rate Error(
Rate (kHz) (Decimal) (kHz)
%)
1250.0
N/A
N/A
N/A
625.0
1
625.0
0.00
250.0
3
208.33 –16.67
115.2
5
125.0
8.51
57.6
11
56.8
–1.36
38.4
16
39.1
1.73
19.2
33
18.9
0.16
BRG
Applicable Divisor Actual Rate Error(
Rate (kHz) (Decimal) (kHz)
%)
9.60
65
9.62
0.16
4.80
130
4.81
0.16
2.40
260
2.40
–0.03
1.20
521
1.20
–0.03
0.60
1042
0.60
–0.03
0.30
2083
0.30
0.2
LIN-UART
PRELIMINARY
PS024604-1005