mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 361

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

Chapter 19
Programmable Interrupt Timers (PIT0–PIT3)
19.1
This chapter describes the operation of the four programmable interrupt timer modules: PIT0–PIT3.
19.1.1
Each PIT is a 16-bit timer that provides precise interrupts at regular intervals with minimal processor
intervention. The timer can count down from the value written in the modulus register or it can be a
free-running down-counter.
19.1.2
19.1.3
This subsection describes the operation of the PIT modules in low-power modes and debug mode of
operation. Low-power modes are described in the power management module,
Management.” Table 19-1
each mode.
Freescale Semiconductor
Internal Bus
Clock (f
Introduction
Overview
Block Diagram
Low-Power Mode Operation
sys
)
Prescaler
PRE[3:0]
DOZE
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
DBG
EN
shows the PIT module operation in low-power modes and how it can exit from
OVW
Figure 19-1. PIT Block Diagram
16-bit PIT Counter
16-bit PCNTRn
16-bit PMRn
Internal Bus
Internal Bus
RLD
Load
Counter
COUNT = 0
PIF
PIE
Chapter 7, “Power
To Interrupt
Controller
19-1