Freescale Semiconductor, Inc.
MSCAN Controller
Low Power Modes
msCAN12 Running
SLPRQ = 0
SLPAK = 0
MCU
MCU
or msCAN12
msCAN12 Sleeping
SLEEP Request
SLPRQ = 1
SLPAK = 1
SLPRQ = 1
SLPAK = 0
msCAN12
Figure 17-6. SLEEP Request / Acknowledge Cycle
17.8.2 msCAN12 SOFT_RESET Mode
In SOFT_RESET mode, the msCAN12 is stopped. Registers can still be
accessed. This mode is used to initialize the module configuration, bit
timing, and the CAN message filter. See msCAN12 Module Control
Register 0 (CMCR0) for a complete description of the SOFT_RESET
mode.
When setting the SFTRES bit, the msCAN12 immediately stops all
ongoing transmissions and receptions, potentially causing the CAN
protocol violations.
NOTE: The user is responsible for ensuring that the msCAN12 is not active
when SOFT_RESET mode is entered. The recommended procedure is
to bring the msCAN12 into SLEEP mode before the SFTRES bit is set.
68HC(9)12D60 — Rev 4.0
MOTOROLA
Advance Information
293
MSCAN Controller
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA [ MOTOROLA ]
