Rainbow Electronics ATmega64M1 - Manual (Page 139)

139
8209A–AVR–08/09
ATmega16M1/32M1/64M1
18.5.3.2 Center Aligned Mode
In center aligned mode, the center of PSCOUTnA and PSCOUTnB signals are centered.
Figure 18-6. PSCOUTnA & PSCOUTnB Basic Waveforms in Center Aligned Mode
On-Time 0 = 2 * POCRnSAH/L * 1/Fclkpsc
On-Time 1 = 2 * (POCRnRBH/L - POCRnSBH/L + 1) * 1/Fclkpsc
Dead-Time = (POCRnSBH/L - POCRnSAH/L) * 1/Fclkpsc
PSC Cycle = 2 * (POCRnRBH/L + 1) * 1/Fclkpsc
Note: Minimal value for PSC Cycle = 2 * 1/Fclkpsc
Note that in center aligned mode, POCRnRAH/L is not required (as it is in one-ramp mode) to
control PSC Output waveform timing. This allows POCRnRAH/L to be freely used to adjust ADC
synchronization (
See “Analog Synchronization” on page 146. ).
On-Time 1
On-Time 0
PSCOUTnA
PSCOUTnB
PSC Cycle
Dead-Time
On-Time 1
Dead-Time
PSC Counter
POCRnRB
POCRnSA
POCRnSB
0