Rainbow Electronics ATtiny28L - Manual (Page 31)

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 0
1
D Q
IPORTA2
FROM
PORTA2
ENABLE SETTING
MODULATOR
STATE
MACHINE
COUNT ENABLE
TO TIMER/COUNTER0
IONTIM
IMCONF
5
ONTIM
MCONF
3
RM
WM
8
5
3
5
3
/
/
/
/
/
/
/
WM: WRITE MODCR
RM: READ MODCR
CLK
PA2
COUNT
ENABLE
ENABLE
SETTING
CLK
PA2