SAM7X128_14 Datasheet, PDF (75/662 Pages) ATMEL Corporation – ARM-based Flash MCU

15. Periodic Interval Timer (PIT)
15.1 Overview
The Periodic Interval Timer (PIT) provides the operating system’s scheduler interrupt. It is designed to offer maximum
accuracy and efficient management, even for systems with long response time.
15.2 Block Diagram
Figure 15-1. Periodic Interval Timer
PIT_MR
PIV
=?
0
0
01
PIT_SR
set
PITS
reset
PIT_MR
PITIEN
pit_irq
MCK
01
20-bit
Counter
12-bit
Adder
read PIT_PIVR
MCK/16
Prescaler
CPIV
PIT_PIVR
PICNT
CPIV
PIT_PIIR
PICNT
SAM7X Series [DATASHEET] 75
6120K–ATARM–11-Feb-14