Rainbow-electronics ATmega8515L Manual do Utilizador descarregar pdf (Página 159)

159

ATmega8515(L)

2512A–AVR–04/02

Table 71. Examples ofUBRR SettingsforCommonly UsedOscillatorFrequencies(Continued)

Baud

Rate

(bps)

osc

= 16.0000 MHz f

osc

= 18.4320 MHz f

osc

= 20.0000 MHz

U2X=0U2X=1U2X=0U2X=1U2X=0U2X=1

UBRR Error UBRR Error UBRR Error UBRR Error UBRR Error UBRR Error

2400 416-0.1% 8320.0% 479 0.0%959 0.0% 520 0.0% 1041 0.0%

4800 207 0.2% 416-0.1% 239 0.0% 479 0.0% 259 0.2% 520 0.0%

9600 103 0.2% 207 0.2% 119 0.0% 239 0.0% 129 0.2% 259 0.2%

14.4k680.6% 138 -0.1%79 0.0% 159 0.0% 86-0.2% 173 -0.2%

19.2k 51 0.2% 103 0.2% 59 0.0% 119 0.0%640.2% 129 0.2%

28.8k34 -0.8%680.6% 39 0.0%790.0% 42 0.9% 86-0.2%

38.4k 25 0.2% 51 0.2% 29 0.0% 59 0.0%32 -1.4%640.2%

57.6k 16 2.1%34 -0.8% 19 0.0%390.0% 21 -1.4% 42 0.9%

76.8k 12 0.2% 25 0.2% 14 0.0% 29 0.0% 15 1.7% 32 -1.4%

115.2k 8 -3.5% 16 2.1%90.0% 19 0.0% 10 -1.4% 21 -1.4%

230.4k3 8.5% 8 -3.5% 40.0%90.0% 48.5% 10 -1.4%

250k30.0%70.0% 4 -7.8% 82.4% 40.0%90.0%

0.5M 10.0%30.0% ––4-7.8% ––40.0%

1M 00.0% 10.0% ––––––––

Max.

(1)

1 Mbps 2 Mbps 1.152 Mbps 2.304 Mbps 1.25 Mbps 2.5 Mbps

1. UBRR = 0,Error=0.0%

1 2 ... 154 155 156 157 158 159 160 161 162 163 164 ... 222 223

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Rainbow-electronics ATmega8515L Manual do Utilizador Página 159