AT90PWM216-16SE ATMEL [ATMEL Corporation], AT90PWM216-16SE Datasheet - Page 209

• Manufacturer Part Number: AT90PWM216-16SE
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable flash
• Manufacturer: ATMEL [ATMEL Corporation]

18.11 Examples of Baud Rate Setting
Table 18-9.
1.
7710D–AVR–08/09
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.
(1)
UBRR = 0, Error = 0.0%
UBRR
25
12
6
3
2
1
1
0
–
–
–
–
–
–
62.5 kbps
Examples of UBRR Settings for Commonly Frequencies
U2X = 0
f
clk
Error
-18.6%
-7.0%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
io
–
–
–
–
–
–
= 1.0000 MHz
For standard crystal, resonator and external oscillator frequencies, the most commonly used
baud rates for asynchronous operation can be generated by using the UBRR settings in
18-9
from the target baud rate, are bold in the table. Higher error ratings are acceptable, but the
Receiver will have less noise resistance when the error ratings are high, especially for large
serial frames (see
lated using the following equation:
UBRR
up to
51
25
12
8
6
3
2
1
1
0
–
–
–
–
125 kbps
U2X = 1
Table
Error
-18.6%
-3.5%
-7.0%
0.2%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
–
–
–
–
18-12. UBRR values which yield an actual baud rate differing less than 0.5%
“Asynchronous Operational Range” on page
UBRR
47
23
11
7
5
3
2
1
1
0
–
–
–
–
115.2 kbps
U2X = 0
f
clk
Error
-25.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
io
–
–
–
–
Error[%]
= 1.8432 MHz
UBRR
95
47
23
15
11
=
7
5
3
2
1
0
–
–
–
230.4 Kbps
U2X = 1
⎛
⎝
1
–
BaudRate
------------------------------------------------------- -
Error
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
–
–
–
BaudRate
Closest Match
UBRR
AT90PWM216/316
51
25
12
8
6
3
2
1
1
0
–
–
–
–
201). The error values are calcu-
125 kpbs
U2X = 0
f
⎞
⎠
clk
Error
-18.6%
-3.5%
-7.0%
0.2%
0.2%
0.2%
8.5%
8.5%
8.5%
8.5%
•
io
100%
–
–
–
–
= 2.0000 MHz
UBRR
103
51
25
16
12
8
6
3
2
1
–
–
–
–
250 kbps
U2X = 1
Error
-3.5%
-7.0%
0.2%
0.2%
0.2%
2.1%
0.2%
8.5%
8.5%
8.5%
Table
–
–
–
–
209