mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 349

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 12
Periodic Interrupt Timer (S12PIT24B4CV1)
12.1
The period interrupt timer (PIT) is an array of 24-bit timers that can be used to trigger peripheral modules
or raise periodic interrupts. Refer to
12.1.1
12.1.2
The PIT includes these features:
12.1.3
Refer to the SoC guide for a detailed explanation of the chip modes.
Freescale Semiconductor
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micro time bases
Four timers implemented as modulus down-counters with independent time-out periods.
Time-out periods selectable between 1 and 2
cycles with 1 <= m <= 256 and 1 <= n <= 65536.
Timers that can be enabled individually.
Four time-out interrupts.
Four time-out trigger output signals available to trigger peripheral modules.
Start of timer channels can be aligned to each other.
Introduction
Number
Version
01.00
01.01
Glossary
Features
Modes of Operation
CCR
SoC
ISR
PIT
28-Apr-05 28-Apr-05
Revision
05-Jul-05
Date
Effective
05-Jul-05
Periodic Interrupt Timer
Interrupt Service Routine
Condition Code Register
System on Chip
clock periods of the 16-bit timer modulus down-counters, which are generated by the 8-bit
modulus down-counters.
Date
S12XS Family Reference Manual, Rev. 1.10
Figure 12-1
Table 12-1. Revision History
Acronyms and Abbreviations
Author
for a simplified block diagram.
24
bus clock cycles. Time-out equals m*n bus clock
Initial Release
Added application section, removed table 1-1
Description of Changes
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