Rainbow-electronics ATtiny28L Manual do Utilizador descarregar pdf (Página 31)

ATtiny28L/V

1062E–10/01

Figure 23. The Hardware Modulator

Figure 24 to Figure 27 show examples on output from the Modulator. Figure 24 also

shows the timing for the enable setting signal and for the count enable signal to

Timer/Counter0.

Figure 24. Modulation with ONTIM = 3, MCONF = 010.

Note: 1. Clock frequency: 455 kHz; modulation frequency: 38 kHz; duty-cycle: 33%

Figure 25. Modulation with ONTIM = 5, MCONF = 001

Note: Clock frequency: 455 kHz; modulation frequency: 38 kHz; duty-cycle: 50%

DISABLE

MODUALTOR

PA2

IPORTA2

FROM

PORTA2

ENABLE SETTING

MODULATOR

STATE

MACHINE

COUNT ENABLE

TO TIMER/COUNTER0

IONTIM

IMCONF

ONTIM

MCONF

WM: WRITE MODCR

RM: READ MODCR

CLK

PA2

COUNT

ENABLE

SETTING

CLK

PA2

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 74 75

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Rainbow-electronics ATtiny28L Manual do Utilizador Página 31