MC68HC912DG128A MOTOROLA [Motorola, Inc], MC68HC912DG128A Datasheet - Page 282
MC68HC912DG128A
Manufacturer Part Number
MC68HC912DG128A
Description
microcontroller unit 16BIT DEVICE
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC912DG128A.pdf
(404 pages)
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Low Power Modes
msCAN12 SLEEP
Mode
MSCAN Controller
MC68HC912DT128A Rev 2.0
282
The msCAN12 has three modes with reduced power consumption
compared to normal mode. In SLEEP and SOFT_RESET mode, 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 emit interrupts (registers can be accessed via background
debug mode).
The CPU can request the msCAN12 to enter this low-power mode by
asserting the SLPRQ bit in the module configuration register (see
Figure
depends on its current activity:
46). The time when the msCAN12 will then enter SLEEP mode
POWER_DOWN
1. X means don’t care.
msCAN Mode
SOFT_RESET
Table 39 msCAN12 vs. CPU operating modes
SLEEP
Normal
MSCAN Controller
Table 39
CSWAI = X
SFTRES = X
SLPAK = X
summarizes the combinations of msCAN12
STOP
(1)
SFTRES = X
SFTRES = 0
SFTRES = 1
SFTRES = 0
CPU Mode
CSWAI = 1
SLPAK = X
CSWAI = 0
CSWAI = 0
CSWAI = 0
SLPAK = 1
SLPAK = 0
SLPAK = 0
WAIT
SFTRES = 0
SFTRES = 1
SFTRES = 0
CSWAI = X
CSWAI = X
CSWAI = X
SLPAK = 1
SLPAK = 0
SLPAK = 0
RUN
MOTOROLA
14-mscan12
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