Rainbow Electronics ATmega128RFA1 - Manual (Page 367)

367
8266A-MCU Wireless-12/09
ATmega128RFA1
Table 23-16. Examples of UBRRn Settings for Commonly Used Oscillator Frequencies (Continued)
f OSC = 11.0592 MHz f OSC = 14.7456 MHz f OSC = 16.0000 MHz
U2Xn = 0 U2Xn = 1 U2Xn = 0 U2Xn = 1 U2Xn = 0 U2Xn = 1
Baud
Rate
(bps) UBRR Error UBRR Error UBRR Error UBRR Error UBRR Error UBRR Error
2400 287 0.0% 575 0.0% 383 0.0% 767 0.0% 416 -0.1% 832 0.0%
4800 143 0.0% 287 0.0% 191 0.0% 383 0.0% 207 0.2% 416 -0.1%
9600 71 0.0% 143 0.0% 95 0.0% 191 0.0% 103 0.2% 207 0.2%
14.4k 47 0.0% 95 0.0% 63 0.0% 127 0.0% 68 0.6% 138 -0.1%
19.2k 35 0.0% 71 0.0% 47 0.0% 95 0.0% 51 0.2% 103 0.2%
28.8k 23 0.0% 47 0.0% 31 0.0% 63 0.0% 34 -0.8% 68 0.6%
38.4k 17 0.0% 35 0.0% 23 0.0% 47 0.0% 25 0.2% 51 0.2%
57.6k 11 0.0% 23 0.0% 15 0.0% 31 0.0% 16 2.1% 34 -0.8%
76.8k 8 0.0% 17 0.0% 11 0.0% 23 0.0% 12 0.2% 25 0.2%
115.2k 5 0.0% 11 0.0% 7 0.0% 15 0.0% 8 -3.5% 16 2.1%
230.4k 2 0.0% 5 0.0% 3 0.0% 7 0.0% 3 8.5% 8 -3.5%
250k 2 -7.8% 5 -7.8% 3 -7.8% 6 5.3% 3 0.0% 7 0.0%
0.5M - - 2 -7.8% 1 -7.8% 3 -7.8% 1 0.0% 3 0.0%
1M - - - - 0 -7.8% 1 -7.8% 0 0.0% 1 0.0%
Max.
(1)
691.2 kbps 1.3824 Mbps 921.6 kbps 1.8432 Mbps 1 Mbps 2 Mbps
Notes: 1. UBRR = 0, Error = 0.0%