at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 130

• Manufacturer Part Number: at90pwm81-16se
• Description: 8-bit Avr Microcontroller With 8k Bytes In- System Programmable Flash
• Manufacturer: ATMEL Corporation

13.20 Analog Synchronization
13.21 Interrupt Handling
130
AT90PWM81
PSC generates a signal to synchronize the sample and hold or the ADC start; synchronization is manda-
tory for measurements.
This signal can be selected between all falling or rising edge of PSCn0 or PSCn1 outputs as defined per
Table 13-11 on page 133
The signal can be shifted by a digital delay defined by the register PASDLY. The shifting clock can be
either Clkpsc or Clkpsc/4, as described per Bit 7, 6, 5– PASDLKn(2:0): Analog Synchronization Output
Delay or Input Blanking select .
Figure 13-40. Analog synchronization
As each PSC can be dedicated for one function, each PSC has its own interrupt system (vector ...)
List of interrupt sources:
• Counter reload (end of On Time 1)
• End of Enhanced Cycle
• PSC Input event (active edge or at the beginning of level configured event)
• PSC Mutual Synchronization Error
CLKPSCn/8
CLKPSCn/4
CLKPSCn/2
CLKPSCn
PASDLKn(2:0)
7
6
5
4
and
Table 13-12 on page
OCRnSA
match
OCRnRA
match
A Trig/Fault
Digital
Delay
PASDLYn
OCRnSB
match
134.
OCRnRB
match
B Trig/Fault
PASDLKn(2)
PSYNCn(1:0)
1
0
PSCnASY
7734M–AVR–03/10