MC68HC08AZ60 Datasheet, PDF (323/452 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
MSCAN Controller (MSCAN08)
Low Power Modes
copying of RxBG into RxFG, message aborts and message
transmissions. If the MSCAN08 is still in bus-off state after Sleep mode
was left, it continues counting the 128*11 consecutive recessive bits.
MSCAN08 Soft
Reset Mode
In Soft Reset mode, the MSCAN08 is stopped. Registers can still be
accessed. This mode is used to initialize the module configuration, bit
timing and the CAN message filter. See MSCAN08 Module Control
Register 0 on page 337 for a complete description of the Soft Reset
mode.
When setting the SFTRES bit, the MSCAN08 immediately stops all
ongoing transmissions and receptions, potentially causing CAN protocol
violations.
NOTE:
The user is responsible to take care that the MSCAN08 is not active
when Soft Reset mode is entered. The recommended procedure is to
bring the MSCAN08 into Sleep mode before the SFTRES bit is set.
MSCAN08 Power
Down Mode
The MSCAN08 is in Power Down mode when the CPU is in Stop mode.
When entering the Power Down mode, the MSCAN08 imediately stops
all ongoing transmissions and receptions, potentially causing CAN
protocol violations.
NOTE:
The user is responsible to take care that the MSCAN08 is not active
when Power Down mode is enterd. The recommended procedure is to
bring the MSCAN08 into Sleep mode before the SOP instruction is
executed.
To protect the CAN bus system from fatal consequences of violations to
the above rule, the MSCAN08 drives the TxCAN pin into recessive state.
In Power Down mode, no registers can be accessed.
19-mscan
MOTOROLA
MC68HC08AZ60 — Rev 1.0
MSCAN Controller (MSCAN08)
323
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