Freescale Semiconductor MPC5200B ユーザーズマニュアル
Overview
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor
7-1
Chapter 7
System Integration Unit (SIU)
System Integration Unit (SIU)
7.1
Overview
The following sections are contained in this document:
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, includes:
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, includes:
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, includes:
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NOTE
Watchdog timer functions are included in the GPT section.
The System Integration Unit (SIU) controls and support the functions listed above.
7.2
Interrupt Controller
A highly configurable Interrupt Controller directs all interrupt sources to the following e300 core interrupt pins:
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core_cint -- critical interrupt
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core_smi -- system management interrupt
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core_int -- standard interrupt
7.2.1
Block Description
The Interrupt Controller MUXes a variety of interrupt sources to the limited interrupt pins on the e300 core. The interrupt sources and their
descriptions are summarized in
descriptions are summarized in
Table 7-1. Interrupt Sources
Source
No.
Description
External IRQ
Interrupts
4
Can be programmed as level or edge sensitive. Provides interrupt requests to
Interrupt Controller for external devices.
Interrupt Controller for external devices.
Slice Timers
2
“Tick” generators. Suitable for operating system update tick.
General Timers
8
Generates interrupt in Input Capture mode or Internal Timer mode. Timers 6 and 7
can interrupt from NAP/DOZE power-down.
can interrupt from NAP/DOZE power-down.
BestComm and
Peripherals
19
Various peripherals are priority programmed and encoded into HI or LO interrupt to
the Interrupt Controller. BestComm Controller interrupt is connected to HI interrupt.
the Interrupt Controller. BestComm Controller interrupt is connected to HI interrupt.
RTC
2
Stopwatch and periodic
WakeUp
8
These are special GPIO pins with WakeUP capability. There are 8 such pins
funneled into one interrupt. The source module is gpio_wkup.
funneled into one interrupt. The source module is gpio_wkup.
GPIO
8
GPIO pins with simple interrupt capability (not available in power down mode). The
source module is gpio_std.
source module is gpio_std.
WatchDog Timer
0
No vector handler, generates
SRESET output indication.
Total
51