Rainbow-electronics ATmega8515L Uživatelský manuál stáhnout pdf (Strana 156)

156

ATmega8515(L)

2512A–AVR–04/02

Table 68. Examples ofUBRR SettingsforCommonly UsedOscillatorFrequencies

Baud

Rate

(bps)

osc

= 1.0000 MHz f

osc

= 1.8432 MHz f

osc

= 2.0000 MHz

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

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

2400 25 0.2% 51 0.2% 47 0.0%950.0% 51 0.2% 103 0.2%

4800 12 0.2% 25 0.2% 23 0.0% 47 0.0% 25 0.2% 51 0.2%

9600 6-7.0% 12 0.2% 11 0.0% 23 0.0% 12 0.2% 25 0.2%

14.4k38.5% 8 -3.5%7 0.0% 15 0.0% 8 -3.5% 16 2.1%

19.2k 28.5%6-7.0% 50.0% 11 0.0%6-7.0% 12 0.2%

28.8k 18.5%38.5%30.0%70.0%38.5% 8 -3.5%

38.4k 1 -18.6% 28.5% 20.0% 50.0% 28.5%6-7.0%

57.6k 08.5% 18.5% 10.0%30.0% 18.5%38.5%

76.8k ––1-18.6% 1 -25.0% 20.0% 1 -18.6% 28.5%

115.2k ––08.5% 00.0% 10.0% 08.5% 18.5%

230.4k ––––––00.0% ––––

250k ––––––––––00.0%

Max.

(1)

62.5 kbps 125 kbps 115.2 kbps 230.4 kbps 125 kbps 250 kbps

1. UBRR = 0,Error=0.0%

1 2 ... 151 152 153 154 155 156 157 158 159 160 161 ... 222 223

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Rainbow-electronics ATmega8515L Uživatelský manuál Strana 156