56F8335 datasheet(73/160 Pages) FREESCALE

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Block Diagram

56F8335 Technical Data, Rev. 5

Freescale Semiconductor

Preliminary

5.4 Block Diagram

Figure 5-1 Interrupt Controller Block Diagram

5.5 Operating Modes

The ITCN module design contains two major modes of operation:

•

Functional Mode

The ITCN is in this mode by default.

•

Wait and Stop Modes

During Wait and Stop modes, the system clocks and the 56800E core are turned off. The ITCN will signal

a pending IRQ to the System Integration Module (SIM) to restart the clocks and service the IRQ. An IRQ

can only wake up the core if the IRQ is enabled prior to entering the Wait or Stop mode. Also, the IRQA

and IRQB signals automatically become low-level sensitive in these modes, even if the control register bits

are set to make them falling-edge sensitive. This is because there is no clock available to detect the falling

edge.

A peripheral which requires a clock to generate interrupts will not be able to generate interrupts during Stop

mode. The FlexCAN module can wake the device from Stop mode, and a reset will do just that, or IRQA

and IRQB can wake it up.

Priority

Level

2 -> 4

Decode

INT1

Priority

Level

2 -> 4

Decode

INT82

Level 0

82 -> 7

Priority

Encoder

any0

Level 3

82 -> 7

Priority

Encoder

any3

INT

VAB

IPIC

CONTROL

PIC_EN

IACK

SR[9:8]

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