mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 1004

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 21 Freescale’s Scalable Controller Area Network (S12MSCANV2)
21.4.5.1
As shown in
run mode.
21.4.5.2
The WAI instruction puts the MCU in a low power consumption stand-by mode. If the CSWAI bit is set,
additional power can be saved in power down mode because the CPU clocks are stopped. After leaving
this power down mode, the MSCAN restarts and enters normal mode again.
While the CPU is in wait mode, the MSCAN can be operated in normal mode and generate interrupts
(registers can be accessed via background debug mode).
21.4.5.3
The STOP instruction puts the MCU in a low power consumption stand-by mode. In stop mode, the
MSCAN is set in power down mode regardless of the value of the SLPRQ/SLPAK and CSWAI bits
(Table
21.4.5.4
This is a non-power-saving mode. Enabling the MSCAN puts the module from disabled mode into normal
mode. In this mode the module can either be in initialization mode or out of initialization mode. See
Section 21.4.4.5, “MSCAN Initialization
1004
1. ‘X’ means don’t care.
21-37).
CPU Mode
STOP
WAIT
RUN
Table
Operation in Run Mode
Operation in Wait Mode
Operation in Stop Mode
MSCAN Normal Mode
21-37, only MSCAN sleep mode is available as low power option when the CPU is in
CSWAI = X
SLPRQ = 0
SLPRQ = 0
CSWAI = 0
SLPAK = 0
SLPAK = 0
Table 21-37. CPU vs. MSCAN Operating Modes
Normal
MC9S12XF - Family Reference Manual, Rev.1.19
(1)
Mode”.
SLPRQ = 1
SLPRQ = 1
CSWAI = X
CSWAI = 0
SLPAK = 1
SLPAK = 1
Sleep
MSCAN Mode
Reduced Power Consumption
Power Down
SLPRQ = X
SLPRQ = X
CSWAI = X
CSWAI = 1
SLPAK = X
SLPAK = X
Freescale Semiconductor
SLPRQ = X
SLPRQ = X
SLPRQ = X
CSWAI = X
CSWAI = X
CSWAI = X
SLPAK = X
SLPAK = X
SLPAK = X
(CANE=0)
Disabled