MCF5282CVM66 Freescale, MCF5282CVM66 Datasheet - Page 489
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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Bits
3–0
9
8
7
6
5
4
SOFTRST
STOPACK
FRZACK
WAKE
Name
SUPV
SELF-
APS
—
Soft reset. When this bit is asserted, the FlexCAN resets its internal state machines (sequencer,
error counters, error flags, and timer) and the host interface registers (CANMCR, CANICR,
CANTCR, IMASK, and IFLAG).
The configuration registers that control the interface with the CAN bus are not changed (CAN-
CTRL[0:2] and PRESDIV). Message buffers and receive message masks are also not changed.
This allows SOFTRST to be used as a debug feature while the system is running.
Setting SOFTRST also clears the STOP bit in CANMCR.
After setting SOFTRST, allow one complete bus cycle to elapse for the internal FlexCAN circuitry
to completely reset before executing another access to CANMCR.
The FlexCAN clears this bit once the internal reset cycle is completed.
0 Soft reset cycle completed
1 Soft reset cycle initiated
FlexCAN disable. When the FlexCAN enters debug mode, it sets the FRZACK bit. This bit should
be polled to determine if the FlexCAN has entered debug mode. When debug mode is exited, this
bit is negated once the FlexCAN prescaler is enabled. This is a read-only bit.
0 The FlexCAN has exited debug mode and the prescaler is enabled.
1 The FlexCAN has entered debug mode, and the prescaler is disabled.
Supervisor/user data space. The SUPV bit places the FlexCAN registers in either supervisor or
user data space.
0 Registers with access controlled by the SUPV bit are accessible in either user or supervisor
1 Registers with access controlled by the SUPV bit are restricted to supervisor mode.
Self wake enable. This bit allows the FlexCAN to wake up when bus activity is detected after the
STOP bit is set. If this bit is set when the FlexCAN enters low-power stop mode, the FlexCAN will
monitor the bus for a recessive to dominant transition. If a recessive to dominant transition is
detected, the FlexCAN immediately clears the STOP bit and restarts its clocks.
If a write to CANMCR with SELFWAKE set occurs at the same time a recessive-to-dominant edge
appears on the CAN bus, the bit will not be set, and the module clocks will not stop. The user
should verify that this bit has been set by reading CANMCR. Refer to
“Low-Power Stop Mode for Power
low-power stop mode.
0 Self wake disabled.
1 Self wake enabled.
Auto-power save. The APS bit allows the FlexCAN to automatically shut off its clocks to save
power when it has no process to execute, and to automatically restart these clocks when it has a
task to execute without any CPU intervention.
0 Auto-power save mode disabled; clocks run normally.
1 Auto-power save mode enabled; clocks stop and restart as needed.
clocks, it sets the STOPACK bit. This bit should be polled to determine if the FlexCAN has entered
low-power stop mode. When the FlexCAN exits low-power stop mode, the STOPACK bit is
cleared once the FlexCAN’s clocks are running.
0 The FlexCAN is not in low-power stop mode and its clocks are running.
1 The FlexCAN has entered low-power stop mode and its clocks are stopped
Reserved, should be cleared.
Stop acknowledge. When the FlexCAN is placed in low-power stop mode and shuts down its
privilege mode.
Table 25-8. CANMCR Field Descriptions (continued)
Saving” for more information on entry into and exit from
Description
Section 25.4.11.2,
FlexCAN
25-19
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