MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 306
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MCF5272VF66
Manufacturer Part Number
MCF5272VF66
Description
Manufacturer
Freescale
Datasheet
1.MCF5272VF66.pdf
(544 pages)
Specifications of MCF5272VF66
Family Name
MCF5xxx
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
66MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
3.3V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
196
Package Type
MA-BGA
Lead Free Status / RoHS Status
Not Compliant
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Physical Layer Interface Controller (PLIC)
Note that only the active, that is enabled, B- and D-channel receive and transmit registers need to be read
and written. B and D channels which are not active need not have their receive and transmit registers read
and written.
It should be clear from
frame (n) is written to the PLIC transmit register during the interrupt service routine of the previous frame,
frame (n-1). Similarly on the receive side, frame (n) is read from the PLIC receive register during the
interrupt service routine of the following frame, frame (n + 2).
delay through the PLIC, when not in loopback mode, is two 2-KHz frames, or 1 mS.
13.2.5.2
The aperiodic status interrupt is an interrupt which is driven by a number of conditions. The CPU services
this interrupt by reading the aperiodic status register, ASR, and by reading or writing the relevant C/I or
monitor channel register or registers which have generated this interrupt. Once read, the interrupt is
cleared. Each port and individual interrupts within each port is maskable. The following conditions for
each of the ports can trigger this interrupt:
13-10
•
•
•
•
Slot 0
125 μs
2-KHz interrupt
Monitor channel receive: ASR defines which port or ports have generated a monitor channel
receive interrupt. The interrupt service routine must then read the appropriate GMR register or
registers to clear the monitor channel receive interrupt.
Monitor channel transmit: ASR defines which port or ports have generated a monitor channel
transmit interrupt. The interrupt service routine must then read the appropriate GMT register or
registers to clear the monitor channel transmit interrupt.
C/I channel receive: ASR defines which port or ports have generated a C/I channel receive
interrupt. The interrupt service routine must then read the appropriate GCIR register or registers to
clear the C/I channel receive interrupt.
C/I channel transmit: ASR defines which port or ports have generated a C/I channel transmit
interrupt. The interrupt service routine must then read the appropriate GCIT register or registers to
clear the C/I channel transmit interrupt.
Read Frame n -1 (B&D)
Write Frame n + 1 (B&D)
Interrupt service routine
GCI Aperiodic Status Interrupt
Slot 1
Frame n
500 μs
MCF5272 ColdFire
Figure 13-10
Slot 2
Slot 3
Figure 13-10. Periodic Frame Interrupt
that due to the double buffering through the PLIC shadow register,
®
Integrated Microprocessor User’s Manual, Rev. 3
2-KHz interrupt
Slot 0
Interrupt service routine
Read Frame n (B&D)
Write Frame n + 2 (B&D)
Slot 1
Frame n + 1
Slot 2
Figure 13-10
Slot 3
2-KHz interrupt
Slot 0
shows that the minimum
Interrupt service routine
Read Frame n + 1 (B&D)
Write Frame n + 3 (B&D)
Frame n + 2
Slot 1
Freescale Semiconductor
Slot 2
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