Rainbow Electronics ATmega64M1 - Manual (Page 138)

138
8209A–AVR–08/09
ATmega16M1/32M1/64M1
Figure 18-4. PSCOUTnA & PSCOUTnB Basic Waveforms in One Ramp mode
On-Time A = (POCRnRAH/L - POCRnSAH/L) * 1/Fclkpsc
On-Time B = (POCRnRBH/L - POCRnSBH/L) * 1/Fclkpsc
Dead-Time A = (POCRnSAH/L + 1) * 1/Fclkpsc
Dead-Time B = (POCRnSBH/L - POCRnRAH/L) * 1/Fclkpsc
Note: Minimal value for Dead-Time A = 1/Fclkpsc
If the overlap protection is disabled, in One-Ramp mode, PSCOUTnA and PSCOUTnB outputs
can be configured to overlap each other, though in normal use this is not desirable.
Figure 18-5. Controlled Start and Stop Mechanism in One-Ramp Mode
Note: See “PCTL – PSC Control Register” on page 151. (PCCYC = 1)
On-Time A On-Time B
PSCOUTnA
PSCOUTnB
Dead-Time B Dead-Time A
PSC Cycle
POCRnRB
POCRnSB
POCRnRA
POCRnSA
PSC Counter
0
PSCOUTnA
PSCOUTnB
PSC Counter
POCRnRB
POCRnRA
POCRnSB
0
Run
POCRnSA