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68HC912DG128PV8 参数 Datasheet PDF下载

68HC912DG128PV8图片预览
型号: 68HC912DG128PV8
PDF下载: 下载PDF文件 查看货源
内容描述: M68HC12微控制器 [M68HC12 Microcontrollers]
分类和应用: 微控制器外围集成电路时钟
文件页数/大小: 452 页 / 3509 K
品牌: FREESCALE [ Freescale ]
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Freescale Semiconductor, Inc.  
MSCAN Controller  
Low Power Modes  
17.8 Low Power Modes  
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. Table 17-2 summarizes the combinations of msCAN12  
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).  
Table 17-2. msCAN12 vs. CPU operating modes  
CPU Mode  
msCAN Mode  
STOP  
WAIT  
RUN  
CSWAI = X(1)  
SLPAK = X  
SFTRES = X  
CSWAI = 1  
SLPAK = X  
SFTRES = X  
POWER_DOWN  
CSWAI = 0  
SLPAK = 1  
SFTRES = 0  
CSWAI = X  
SLPAK = 1  
SFTRES = 0  
SLEEP  
SOFT_RESET  
Normal  
CSWAI = 0  
SLPAK = 0  
SFTRES = 1  
CSWAI = X  
SLPAK = 0  
SFTRES = 1  
CSWAI = 0  
SLPAK = 0  
SFTRES = 0  
CSWAI = X  
SLPAK = 0  
SFTRES = 0  
1. X means don’t care.  
MC68HC912DG128 — Rev 3.0  
Technical Data  
MSCAN Controller  
For More Information On This Product,  
Go to: www.freescale.com  
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