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MC705C8ACPE 参数 Datasheet PDF下载

MC705C8ACPE图片预览
型号: MC705C8ACPE
PDF下载: 下载PDF文件 查看货源
内容描述: 技术参数 [Technical Data]
分类和应用:
文件页数/大小: 222 页 / 1735 K
品牌: FREESCALE [ Freescale ]
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Freescale Semiconductor, Inc.  
Low-Power Modes  
Data-Retention Mode  
6.4.1 Programmable COP Watchdog in Wait Mode  
The programmable COP watchdog is active during wait mode. Software  
must periodically bring the MCU out of wait mode to clear the  
programmable COP watchdog.  
6.4.2 Non-Programmable COP Watchdog in Wait Mode  
The non-programmable COP watchdog is active during wait mode.  
Software must periodically bring the MCU out of wait mode to clear the  
non-programmable COP watchdog.  
6.5 Data-Retention Mode  
In data-retention mode, the MCU retains random-access memory (RAM)  
contents and CPU register contents at VDD voltages as low as 2.0 Vdc.  
The data-retention feature allows the MCU to remain in a low  
power-consumption state during which it retains data, but the CPU  
cannot execute instructions.  
To put the MCU in data-retention mode:  
1. Drive the RESET pin to logic 0.  
2. Lower VDD voltage. The RESET pin must remain low continuously  
during data-retention mode.  
To take the MCU out of data-retention mode:  
1. Return VDD to normal operating voltage.  
2. Return the RESET pin to logic 1.  
MC68HC705C8A — Rev. 3  
MOTOROLA  
Technical Data  
Low-Power Modes  
For More Information On This Product,  
Go to: www.freescale.com  
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