MCF5282CVM66 Freescale, MCF5282CVM66 Datasheet - Page 487
MCF5282CVM66
Manufacturer Part Number
MCF5282CVM66
Description
Manufacturer
Freescale
Datasheet
1.MCF5282CVM66.pdf
(766 pages)
Specifications of MCF5282CVM66
Cpu Family
MCF528x
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
66MHz
Interface Type
CAN/I2C/QSPI/UART
Total Internal Ram Size
64KB
# I/os (max)
150
Number Of Timers - General Purpose
12
Operating Supply Voltage (typ)
3.3V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
256
Package Type
MA-BGA
Program Memory Type
Flash
Program Memory Size
512KB
Lead Free Status / RoHS Status
Compliant
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25.4.11.3 Auto-Power Save Mode
Auto-power save mode enables normal operation with optimized power savings. Once the auto-power
save (APS) bit in CANMCR is set, the FlexCAN looks for a set of conditions in which there is no need for
its clocks to be running. If these conditions are met, the FlexCAN stops its clocks, thus saving power. The
following conditions will activate auto-power save mode.
While its clocks are stopped, if the FlexCAN senses that any one of the aforementioned conditions is no
longer true, it restarts its clocks. The FlexCAN then continues to monitor these conditions and
stops/restarts its clocks accordingly.
25.4.12 Interrupts
The module can generate up to 19 interrupt sources (16 interrupts due to message buffers and 3 interrupts
due to Bus-off, Error and Wake-up). Each one of the message buffers can be an interrupt source, if its
corresponding IMASK bit is set.
There is no distinction between Tx and Rx interrupts for a particular buffer, under the assumption that the
buffer is initialized for either transmission or reception, and thus its interrupt routine can be fixed at
compilation time. Each of the buffers is assigned a bit in the IFLAG register. The bit is set when the
corresponding buffer completes a successful transmission or reception, and cleared when the CPU reads
the interrupt flag register (IFLAG) while the associated bit is set, and then writes it back as ‘1’ (and no new
event of the same type occurs between the read and the write actions).
The other 3 interrupt sources (Bus-off, Error and Wake-up) act in the same way, and are located in the Error
& Status register. The Bus-off and Error interrupt mask bits are located in the CANCTRL0 register, and
the Wake-up interrupt mask bit is located in the CANMCR.
25.5
This section describes the registers in the FlexCAN module.
Programming the FlexCAN control registers is typically done during system initialization, prior to the
FlexCAN becoming synchronized with the CAN bus. The configuration registers can be changed after
synchronization by halting the FlexCAN module. This is done when the user sets the HALT bit in the
FlexCAN module configuration register (CANMCR). The FlexCAN responds by setting the
CANMCR[NOTRDY] bit. Additionally, the control registers can be modified while the MCU is in
background debug mode.
Freescale Semiconductor
•
•
•
•
No Rx/Tx frame in progress.
No transfer of Rx/Tx frames to and from an SMB, and no Tx frame awaiting transmission in any
message buffer.
No CPU access to the FlexCAN module.
The FlexCAN is not in debug mode, low-power stop mode, or the bus off state.
Programmer’s Model
The FlexCAN has no hard-wired protection against invalid bit/field
programming within its registers. Specifically, no protection is provided if
the programming does not meet CAN protocol requirements.
NOTE
FlexCAN
25-17
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