MC68HC08AZ0 Datasheet, PDF (384/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
msCAN08 Controller (msCAN08)
SLPAK — Sleep mode acknowledge
This flag indicates whether the msCAN08 is in module internal sleep
mode. It shall be used as a handshake for the sleep mode request
(see msCAN08 internal sleep mode on page 368).
1 = Sleep – The msCAN08 is in internal sleep mode.
0 = Wake-up – The msCAN08 will function normally.
SLPRQ — Sleep request, go to internal sleep mode
This flag allows to request the msCAN08 to go into an internal
power-saving mode (see msCAN08 internal sleep mode on page
368).
1 = Sleep – The msCAN08 will go into internal sleep mode if and
as long as there is no activity on the bus.
0 = Wake-up – The msCAN08 will function normally. If SLPRQ is
cleared by the CPU then the msCAN08 will wake up, but will
not issue a wake-up interrupt.
SFTRES — Soft reset
When this bit is set by the CPU, the msCAN08 immediately enters the
soft reset state. Any ongoing transmission or reception is aborted and
synchronization to the bus is lost.
The following registers will go into the same state as out of hard reset:
CMCR0, CRFLG, CRIER, CTFLG, CTCR.
The registers CMCR1, CBTR0, CBTR1, CIDAC, CIDAR0-3,
CIDMR0-3 can only be written by the CPU when the msCAN08 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 msCAN08 will try to
synchronize to the CAN bus: If the msCAN08 is not in bus-off state it
will be synchronized after 11 recessive bits on the bus; if the
msCAN08 is in bus-off state it continues to wait for 128 occurrences
of 11 recessive bits.
1 = msCAN08 in soft reset state.
0 = Normal operation
MC68HC08AZ0
382
msCAN08 Controller (msCAN08)
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