atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 148

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

14.12 Analog Synchronization
14.13 Interrupt Handling
14.14 PSC Clock Sources
148
ATmega32/64/M1/C1
Each PSC module generates a signal to synchronize the ADC sample and hold; synchronisation
is mandatory for measurements.
This signal can be selected between all falling or rising edge of PSCOUTnA or PSCOUTnB
outputs.
In center aligned mode, OCRnRAH/L is not used, so it can be used to specified the synchroniza-
tion of the ADC. It this case, it’s minimum value is 1.
As each PSC module can be dedicated for one function, each PSC has its own interrupt system
(vector ...)
List of interrupt sources:
•
•
•
Each PSC has two clock inputs:
•
•
Figure 14-14. Clock selection
PCLKSELn bit in PSC Control Register (PCTL) is used to select the clock source.
PPREn1/0 bits in PSC Control Register (PCTL) are used to select the divide factor of the clock.
Table 14-6.
PCLKSELn
0
0
0
Counter reload (end of On Time 1)
PSC Input event (active edge or at the beginning of level configured event)
PSC Mutual Synchronization Error
CLK PLL from the PLL
CLK I/O
CLK
CLK
PLL
I/O
Output Clock versus Selection and Prescaler
PPREn1
0
0
1
PCLKSEL
1
0
PPREn0
0
1
0
CK
PRESCALER
CLKPSCn output
CLK I/O
CLK I/O / 4
CLK I/O / 32
CLK
PSCn
PPREn1/0
7647A–AVR–02/08