AT90PWM2B-16SE ATMEL [ATMEL Corporation], AT90PWM2B-16SE Datasheet - Page 207

• Manufacturer Part Number: AT90PWM2B-16SE
• Description: 8-bit Microcontroller with 8K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Table 18-9.
1.
Table 18-10. Examples of UBRR Settings for Commonly Frequencies (Continued)
4317J–AVR–08/10
Baud
Rate
(bps)
2400
4800
9600
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
115.2k
230.4k
250k
500k
1M
Max.
Baud
Rate
(bps)
2400
4800
9600
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
115.2k
230.4k
250k
(1)
UBRR = 0, Error = 0.0%
UBRR
f
U2X = 0
UBRR
clk
25
12
95
47
23
15
11
6
3
2
1
1
0
–
–
–
–
–
–
7
5
3
2
1
0
0
io
62.5 kbps
Examples of UBRR Settings for Commonly Frequencies
U2X = 0
= 3.6864 MHz
f
clk
Error
-18.6%
Error
-7.0%
-7.8%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
io
–
–
–
–
–
–
= 1.0000 MHz
UBRR
U2X = 1
UBRR
191
51
25
12
95
47
31
23
15
11
8
6
3
2
1
1
0
–
–
–
–
7
5
3
1
1
125 kbps
U2X = 1
Error
Error
-18.6%
-3.5%
-7.0%
-7.8%
0.2%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
–
–
UBRR
f
U2X = 0
UBRR
clk
103
47
23
11
51
25
16
12
7
5
3
2
1
1
0
–
–
–
–
3
2
1
0
8
6
0
115.2 kbps
io
U2X = 0
= 4.0000 MHz
f
clk
Error
Error
-25.0%
-3.5%
-7.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
0.0%
io
–
–
–
–
= 1.8432 MHz
UBRR
U2X = 1
UBRR
207
103
95
47
23
15
11
51
34
25
16
12
7
5
3
2
1
0
–
–
–
8
6
3
1
1
230.4 Kbps
U2X = 1
Error
Error
-0.8%
-3.5%
-7.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.2%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
0.0%
–
–
–
AT90PWM2/3/2B/3B
UBRR
f
U2X = 0
UBRR
clk
191
51
25
12
95
47
31
23
15
11
8
6
3
2
1
1
0
–
–
–
–
7
5
3
1
1
io
125 kpbs
U2X = 0
= 7.3728 MHz
f
clk
Error
Error
-18.6%
-3.5%
-7.0%
-7.8%
0.2%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
io
–
–
–
–
= 2.0000 MHz
UBRR
U2X = 1
UBRR
103
383
191
51
25
16
12
95
63
47
31
23
15
11
8
6
3
2
1
–
–
–
–
7
3
3
250 kbps
U2X = 1
Error
Error
-3.5%
-7.0%
-7.8%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
–
–
207