MC68HC08AZ60A Datasheet, PDF (363/480 Pages) Motorola, Inc – Microcontrollers

MSCAN08 Controller (MSCAN08)
Low Power Modes
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.
21.9.3 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 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 Power Down mode is entered. The recommended procedure is to
bring the MSCAN08 into Sleep mode before the STOP 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.
MSCAN08 bus activity can wake the MCU from CPU Stop/MSCAN08
power-down mode. However, until the oscillator starts up and
synchronisation is achieved the MSCAN08 will not respond to incoming
data.
21.9.4 CPU Wait Mode
The MSCAN08 module remains active during CPU wait mode. The
MSCAN08 will stay synchronized to the CAN bus and generates
transmit, receive, and error interrupts to the CPU, if enabled. Any such
interrupt will bring the MCU out of wait mode.
MC68HC08AZ60A — Rev 0.0
MOTOROLA
MSCAN08 Controller (MSCAN08)
Advance Information
363