PXN20RM Datasheet, PDF (495/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Chapter 22
Periodic Interrupt Timer (PIT)
22.1 Introduction
The Periodic Interrupt Timer (PIT) is an array of timers that can be used to initiate interrupts and trigger
DMA channels.
22.1.1 Block Diagram
A simplified block diagram of the PIT illustrates the functionality and interdependence of major blocks
(see Figure 22-1).
Peripheral
bus
PIT
PIT
Registers
load_value
timeout
Timer 1
interrupts
triggers
Timer 2
.
.
.
.
.
.
Timer 8
Peripheral
bus clock
Figure 22-1. PIT Block Diagram
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
22-1