S912XEQ384J3MALR Freescale Semiconductor, S912XEQ384J3MALR Datasheet - Page 659

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

Chapter 17
Periodic Interrupt Timer (S12PIT24B8CV2)
17.1
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
17.1.1
17.1.2
The PIT includes these features:
17.1.3
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
Eight 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.
Eight time-out interrupts.
Eight time-out trigger output signals available to trigger peripheral modules.
Start of timer channels can be aligned to each other.
Introduction
RevisionDate
Glossary
Features
Modes of Operation
CCR
SoC
28 Apr 2005
ISR
05 Jul 2005
PIT
17.6/17-674
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 17-1
Table 17-1. 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
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