AT90PWM2_10 Datasheet, PDF (208/361 Pages) ATMEL Corporation – 8-bit Microcontroller with 8K Bytes In-System Programmable Flash

Table 18-10. Examples of UBRR Settings for Commonly Frequencies (Continued)
Baud
Rate
(bps)
fclk_io = 3.6864 MHz
U2X = 0
U2X = 1
UBRR Error UBRR Error
fclk_io = 4.0000 MHz
U2X = 0
U2X = 1
UBRR Error UBRR Error
fclk_io = 7.3728 MHz
U2X = 0
U2X = 1
UBRR Error UBRR Error
500k
–
–
0
-7.8%
–
–
0
0.0%
0
-7.8%
1
-7.8%
1M
Max. ⁽¹⁾
–
–
230.4 kbps
–
–
460.8 kbps
–
–
250 kbps
–
–
0.5 Mbps
–
–
460.8 kpbs
0
-7.8%
921.6 kbps
1.
UBRR = 0, Error = 0.0%
208 AT90PWM2/3/2B/3B
4317J–AVR–08/10