mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 325

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

17.8 Low Power Modes
MC68HC912DG128 — Rev 3.0
MOTOROLA
In addition to normal mode, the msCAN12 has three modes with
reduced power consumption: SLEEP, SOFT_RESET and
POWER_DOWN. In SLEEP and SOFT_RESET modes, power
consumption is reduced by stopping all clocks except those to access
the registers. In POWER_DOWN mode, all clocks are stopped and no
power is consumed.
The WAI and STOP instructions put the MCU in low power consumption
stand-by modes.
and CPU modes. A particular combination of modes is entered for the
given settings of the bits CSWAI, SLPAK, and SFTRES. For all modes,
an msCAN wake-up interrupt can occur only if SLPAK=WUPIE=1. While
the CPU is in Wait Mode, the msCAN12 can be operated in Normal
Mode and generate interrupts (registers can be accessed via
background debug mode).
Freescale Semiconductor, Inc.
For More Information On This Product,
POWER_DOWN
1. X means don’t care.
msCAN Mode
SOFT_RESET
Table 17-2. msCAN12 vs. CPU operating modes
SLEEP
Normal
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MSCAN Controller
Table 17-2
CSWAI = X
SFTRES = X
SLPAK = X
STOP
summarizes the combinations of msCAN12
(1)
SFTRES = X
SFTRES = 0
SFTRES = 1
SFTRES = 0
CPU Mode
SLPAK = X
CSWAI = 1
CSWAI = 0
SLPAK = 1
CSWAI = 0
SLPAK = 0
CSWAI = 0
SLPAK = 0
WAIT
SFTRES = 0
SFTRES = 1
SFTRES = 0
CSWAI = X
CSWAI = X
CSWAI = X
SLPAK = 1
SLPAK = 0
SLPAK = 0
RUN
MSCAN Controller
Low Power Modes
Technical Data
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