S912XEQ384J3MALR Freescale Semiconductor, S912XEQ384J3MALR Datasheet - Page 677

• Manufacturer Part Number: S912XEQ384J3MALR
• Description: S912XEQ Series 16 Bit 50 Mhz 384 KB Flash 24 KB Ram Microcontroller - LQFP-112
• Manufacturer: Freescale Semiconductor

Chapter 18
Periodic Interrupt Timer (S12PIT24B4CV2)
18.1
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
18.1.1
18.1.2
The PIT includes these features:
18.1.3
Refer to the device overview for a detailed explanation of the chip modes.
Freescale Semiconductor
Revision
Number
V01.00
V01.01
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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
Glossary
Features
Modes of Operation
CCR
SoC
28 Apr 2005
ISR
05 Jul 2005
PIT
Revision
Date
18.6/18-690
Sections
Affected
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.
MC9S12XE-Family Reference Manual Rev. 1.24
Figure 18-1
Table 18-1. Revision History
Acronyms and Abbreviations
- Initial Release
- Added application section.
- Removed table 1-1
for a simplified block diagram.
24
bus clock cycles. Time-out equals m*n bus clock
Description of Changes
677