Z51F3220FNX Datasheet, PDF (261/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
11.14.1 Baud Rate setting (example)
Table 11-25 Examples of USI0BD and USI1BD Settings for Commonly Used Oscillator Frequencies
Baud
Rate
fx=1.00MHz
USI0BD/USI1BD
ERROR
2400
25
4800
12
9600
6
14.4k
3
19.2k
2
28.8k
1
38.4k
1
57.6k
-
76.8k
-
115.2k
-
230.4k
-
0.2%
0.2%
-7.0%
8.5%
8.5%
8.5%
-18.6%
-
-
-
-
(continued)
Baud
Rate
fx=3.6864MHz
USI0BD/USI1BD
ERROR
2400
95
4800
47
9600
23
14.4k
15
19.2k
11
28.8k
7
38.4k
5
57.6k
3
76.8k
2
115.2k
1
230.4k
-
250k
-
0.5M
-
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
-
-
-
(continued)
Baud
Rate
fx=8.00MHz
USI0BD/USI1BD
ERROR
2400
207
4800
103
9600
51
14.4k
34
19.2k
25
28.8k
16
38.4k
12
57.6k
8
76.8k
6
115.2k
3
230.4k
1
250k
1
0.5M
-
1M
-
0.2%
0.2%
0.2%
-0.8%
0.2%
2.1%
0.2%
-3.5%
-7.0%
8.5%
8.5%
0.0%
-
-
fx=1.8432MHz
USI0BD/USI1BD
ERROR
47
0.0%
23
0.0%
11
0.0%
7
0.0%
5
0.0%
3
0.0%
2
0.0%
1
-25.0%
1
0.0%
-
-
-
-
fx=4.00MHz
USI0BD/USI1BD
ERROR
103
0.2%
51
0.2%
25
0.2%
16
2.1%
12
0.2%
8
-3.5%
6
-7.0%
3
8.5%
2
8.5%
1
8.5%
-
-
-
-
-
-
fx=11.0592MHz
USI0BD/USI1BD
ERROR
-
-
143
0.0%
71
0.0%
47
0.0%
35
0.0%
23
0.0%
17
0.0%
11
0.0%
8
0.0%
5
0.0%
2
0.0%
2
-7.8%
-
-
-
-
fx=2.00MHz
USI0BD/USI1BD
ERROR
51
0.2%
25
0.2%
12
0.2%
8
-3.5%
6
-7.0%
3
8.5%
2
8.5%
1
8.5%
1
-18.6%
-
-
-
-
fx=7.3728MHz
USI0BD/USI1BD
ERROR
191
0.0%
95
0.0%
47
0.0%
31
0.0%
23
0.0%
15
0.0%
11
0.0%
7
0.0%
5
0.0%
3
0.0%
1
0.0%
1
-7.8%
-
-
PS029902-0212
PRELIMINARY
259