MC68HC08AZ0 Datasheet, PDF (368/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
msCAN08 Controller (msCAN08)
Protocol violation protection
The msCAN08 will protect the user from accidentally violating the CAN
protocol through programming errors. The protection logic implements
the following features:
• The receive and transmit error counters can not be written or
otherwise manipulated.
• All registers which control the configuration of the msCAN08 can
not be modified while the msCAN08 is on-line. The SFTRES bit in
the msCAN08 Module Control Register (see msCAN08 module
control register (CMCR1) on page 383) serves as a lock to protect
the following registers:
– msCAN08 Module Control Register 1 (CMCR1)
– msCAN08 Bus Timing Register 0 and 1 (CBTR0, CBTR1)
– msCAN08 Identifier Acceptance Control Register (CIDAC)
– msCAN08 Identifier Acceptance Registers (CIDAR0-3)
– msCAN08 Identifier Mask Registers (CIDMR0-3)
• The TxCAN pin is forced to Recessive if the CPU goes into STOP
mode.
MC68HC08AZ0
366
msCAN08 Controller (msCAN08)
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