atmega323l ATMEL Corporation, atmega323l Datasheet - Page 100

• Manufacturer Part Number: atmega323l
• Description: Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

100
ATmega323(L)
Table 36. Examples of UBRR Settings for Commonly Used Oscillator Frequencies –
UBRR = 0, Error = 0.0%
14.4K
19.2K
28.8K
38.4K
57.6K
76.8K
115.2K
230.4K
250K
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
0.5M
1M
Max
Baud
Rate
(bps)
2400
4800
9600
14.4K
UBRR
UBRR
103
207
103
51
25
16
12
51
34
8
6
3
2
1
1
0
–
–
8
6
3
2
1
0
0
–
–
125 Kbps
250 Kbps
U2X = 0
U2X = 0
f
f
-18.6%
osc
osc
-3.5%
-7.0%
-3.5%
-7.0%
-0.8%
Error
Error
8.5%
8.5%
8.5%
8.5%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
8.5%
0.0%
0.2%
0.2%
0.2%
(Continued)
–
–
–
–
= 4.0000 MHz
= 8.0000 MHz
UBRR
UBRR
207
103
416
207
103
16
12
51
34
25
16
12
68
8
6
3
2
1
–
0
8
6
3
1
1
0
–
250 Kbps
0.5 Mbps
U2X = 1
U2X = 1
-3.5%
-7.0%
-0.8%
-3.5%
-7.0%
-0.1%
Error
Error
2.1%
0.2%
8.5%
8.5%
8.5%
0.0%
0.2%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
0.0%
0.0%
0.2%
0.2%
0.6%
–
–
UBRR
191
15
11
95
47
31
23
15
11
7
5
3
2
1
0
0
–
7
5
3
1
1
0
–
230.4 Kbps
460.8 Kpbs
U2X = 0
f
-7.8%
osc
-7.8%
-7.8%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
= 7.3728 MHz
UBRR
383
191
31
23
15
11
95
63
47
31
23
15
11
7
5
3
1
1
0
460.8 Kbps
7
3
3
1
0
921.6 Kbps
1457G–AVR–09/03
U2X = 1
-7.8%
-7.8%
-7.8%
-7.8%
-7.8%
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%