Z8F082A28100KIT ZILOG [Zilog, Inc.], Z8F082A28100KIT Datasheet - Page 120

• Manufacturer Part Number: Z8F082A28100KIT
• Description: Z8 Encore XP-R F08xA Series with eXtended Peripherals
• Manufacturer: ZILOG [Zilog, Inc.]

PS024705-0405
10.0 MHz System Clock
Rate (KHz)
Acceptable
1250.0
625.0
250.0
115.2
UART Baud Rate Divisor Value (BRG)
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
UART Baud Rate Error (%)
BRG Divisor
The baud rate error relative to the acceptable baud rate is calculated using the following
equation:
For reliable communication, the UART baud rate error must never exceed 5 percent.
Table 69 provides information about data rate errors for popular baud rates and commonly
used crystal oscillator frequencies.
(Decimal)
1042
2083
N/A
130
260
521
16
33
65
11
1
3
5
Actual Rate
208.33
(KHz)
625.0
125.0
56.8
39.1
18.9
9.62
4.81
2.40
1.20
0.60
0.30
N/A
Table 69. UART Baud Rates
-16.67
P R E L I M I N A R Y
Error
-1.36
-0.03
-0.03
-0.03
0.00
8.51
1.73
0.16
0.16
0.16
(%)
N/A
0.2
=
100
=
×
Round
5.5296 MHz System Clock
⎛
⎝
Rate (KHz)
Acceptable
Actual Data Rate Desired Data Rate
------------------------------------------------------------------------------------------------ -
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
⎛
⎝
System Clock Frequency (Hz)
--------------------------------------------------------------------------- -
16 UART Data Rate (bits/s)
Desired Data Rate
×
Z8 Encore! XP
BRG Divisor
(Decimal)
1152
N/A
N/A
144
288
576
18
36
72
1
3
6
9
–
Product Specification
Actual Rate
®
(KHz)
345.6
115.2
57.6
38.4
19.2
9.60
4.80
2.40
1.20
0.60
0.30
N/A
N/A
F08xA Seriess
Error
38.24
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
⎞
⎠
N/A
N/A
(%)
UART
⎞
⎠
102