Rainbow-electronics ATmega64M1 Manual do Utilizador descarregar pdf (Página 139)

100

101

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

1 2 ... 134 135 136 137 138 139 140 141 142 143 144 ... 342 343

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