AN2184 Freescale Semiconductor / Motorola, AN2184 Datasheet - Page 14
AN2184
Manufacturer Part Number
AN2184
Description
MCF5272 Interrupt Service Routine for the Physical Layer Interface Controller
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
1.AN2184.pdf
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In fact, even if the PLPSR has been updated, the corresponding bit in the PnICR (IE) may not have been
programmed; thus the ISR process cannot be called by this port. The flow chart is shown in Figure 10.
Part VI Aperiodic Interrupt Process
This part describes port sequence, multi-port case, registers, channel sequence, abort condition, and the
command indicate channel.
6.1 Aperiodic One-Port Sequence
This section explains how the aperiodic interrupt is used with one port enabled. The next section describes
a multi-channel approach. When one port is enabled, a level of priority must be set up. For obvious
reasons, the CI channel will be top priority because of its ability to activate and deactivate. As far the
Aperiodic Interrupt Process Aperiodic One-Port Sequence
14
1. PnICR: PLIC Interrupt Configuration register
2. PnPSR: PLIC Periodic Status Register
Figure 10. Multi-Port Processing Interrupt Service Routine Flow Diagram
No
No
No
No
Process End
Interrupts
(IE) = 1
(IE) = 1
(IE) = 1
(IE) = 1
P0ICR
P1ICR
P2ICR
P3ICR
ON
Freescale Semiconductor, Inc.
For More Information On This Product,
MCF5272 Interrupt Service Routine
Yes
Yes
Yes
Yes
Go to: www.freescale.com
No
No
No
No
P0PSR != 0
P1PSR != 0
P2PSR != 0
P3PSR != 0
Yes
Yes
Yes
Yes
Process Port0
Process Port1
Process Port2
Process Port3
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