atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 140

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

14.6
140
Update of Values
ATmega32/64/M1/C1
POCRnRB
POCRnSB
POCRnSA
PSC Counter
Run
PSCOUTnA
PSCOUTnB
PSC Cycle = 2 * (POCRnRBH/L + 1) * 1/Fclkpsc
Note:
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 (
Figure 14-7. Controlled Start and Stop Mechanism in Centered Mode
Note:
To avoid unasynchronous and incoherent values in a cycle, if an update of one of several values
is necessary, all values are updated at the same time at the end of the cycle by the PSC. The
new set of values is calculated by sofware and the update is initiated by software.
Figure 14-8. Update at the end of complete PSC cycle.
The software can stop the cycle before the end to update the values and restart a new PSC
cycle.
Software
PSC
Minimal value for PSC Cycle = 2 * 1/Fclkpsc
See “PSC Control Register – PCTL” on page
Regulation Loop
Calculation
Cycle
With Set i
See “Analog Synchronization” on page 148.
Cycle
With Set i
Cycle
With Set i
Writting in
PSC Registers
0
Cycle
With Set i
End of Cycle
Request for
an Update
153.(PCCYC = 1)
Cycle
With Set j
).
7647A–AVR–02/08