ATmega325PA Atmel Corporation, ATmega325PA Datasheet - Page 190

• Manufacturer Part Number: ATmega325PA
• Manufacturer: Atmel Corporation

Table 20-5.
8285D–AVR–06/11
Baud
Rate
(bps)
2400
4800
9600
14.4k
19.2k
28.8k
38.4k
57.6k
76.8k
115.2k
230.4k
250k
0.5M
1M
Max.
(1)
f
U2Xn = 0
UBRRn
osc
95
47
23
15
11
230.4 kbps
7
5
3
2
1
0
0
–
–
= 3.6864MHz
Examples of UBRRn Settings for Commonly Used Oscillator Frequencies (Continued)
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P
Error
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
UBRRn
U2Xn = 1
191
95
47
31
23
15
11
460.8 kbps
7
5
3
1
1
0
–
Error
-7.8%
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
f
U2Xn = 0
UBRRn
osc
103
51
25
16
12
8
6
3
2
1
0
0
–
–
250 kbps
= 4.0000MHz
Error
-3.5%
-7.0%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
–
–
U2Xn = 1
UBRRn
207
103
51
34
25
16
12
8
6
3
1
1
0
–
0.5 Mbps
Error
-0.8%
-3.5%
-7.0%
0.0%
0.2%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
0.0%
–
f
U2Xn = 0
UBRRn
osc
191
95
47
31
23
15
11
460.8 kbps
7
5
3
1
1
0
–
= 7.3728MHz
Error
-7.8%
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
U2Xn = 1
UBRRn
383
191
95
63
47
31
23
15
11
921.6 kbps
7
3
3
1
0
Error
-7.8%
-7.8%
-7.8%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
190