XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 285

• Manufacturer Part Number: XC912BC32CFU8
• Description: M68HC12B Family Data Sheet
• Manufacturer: Motorola Semiconductor Products

M68HC12B Family — Rev. 8.0
MOTOROLA
TLNKEN — Timer Enable Flag
SLPAK — Sleep Mode Acknowledge Flag
SLPRQ — Sleep Request, Go To Sleep Mode Flag
SFTRES — Soft-Reset Bit
This flag is used to establish a link between the msCAN12 and the on-chip timer.
See
This flag indicates whether the msCAN12 is in module internal sleep mode. It
shall be used as a handshake for the sleep mode request. See
msCAN12 Sleep
This flag requests the msCAN12 to go into an internal power-saving mode (see
16.7.1 msCAN12 Sleep
When this bit is set by the CPU, the msCAN12 immediately enters the soft-reset
state. Any on-going transmission or reception is aborted and synchronization to
the bus is lost.
These registers will go into and stay in the same state as out of hard reset:
CMCR0, CRFLG, CRIER, CTFLG, and CTCR.
Registers CMCR1, CBTR0, CBTR1, CIDAC, CIDAR0–CIDAR7, and
CIDMR0–CIDMR7 can be written only by the CPU when the msCAN12 is in
soft-reset state. The values of the error counters are not affected by soft reset.
When this bit is cleared by the CPU, the msCAN12 will try to synchronize to the
CAN bus. For example, if the msCAN12 is not in bus-off state, it will be
synchronized after 11 recessive bits on the bus; if the msCAN12 is in bus-off
state, it continues to wait for 128 occurrences of 11 recessive bits.
Clearing SFTRES and writing to other bits in CMCR0 must be in separate
instructions.
0 = Port is connected to the timer input.
1 = msCAN12 timer signal output is connected to the timer input.
0 = Wakeup – The msCAN12 is not in sleep mode.
1 = Sleep – The msCAN12 is in sleep mode.
0 = Wakeup – The msCAN12 will function normally.
1 = Sleep request – The msCAN12 will go into sleep mode.
0 = Normal operation
1 = msCAN12 in soft-reset state
16.8 Timer
Link.
Mode.
msCAN12 Controller
Mode).
Programmer’s Model of Control Registers
msCAN12 Controller
16.7.1
Data Sheet
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