HIMA F7115 Channel isolation module

After finishing the interrupt service routine and issuing the reti instruction to return back, its operation will be:  The program counter will be restored automatically from the stack memory specified by register sp.  New sp will be updated to sp-2.  Global interrupt will be enabled automatically. The next instruction will be the original one before interrupt. User must reserve enough stack memory for interrupt, two bytes stack memory for one level interrupt and four bytes for two levels interrupt. For interrupt operation, the following sample program shows how to handle the interrupt, noticing that it needs four bytes stack memory to handle interrupt and pushaf.

Power-Save and Power-Down 

There are three operational modes defined by hardware: ON mode, Power-Save mode and Power-Down modes. ON mode is the state of normal operation with all functions ON, Power-save mode (“stopexe”) is the state to reduce operating current and CPU keeps ready to continue, Power-Down mode (“stopsys”) is used to save power deeply. Therefore, Power-save mode is used in the system which needs low operating power with wake-up occasionally and Power-Down mode is used in the system which needs power down deeply with seldom wake-up. Fig. 15 shows the differences in oscillator modules between Power-Save mode (“stopexe”) and Power-Down mode (“stopsys”).

Power-Save mode (“stopexe”)

 Using “stopexe” instruction to enter the Power-Save mode, only system clock is disabled, remaining all the oscillator modules active. For CPU, it stops executing; however, for Timer16, counter keep counting if its clock source is not the system clock. The wake-up sources for “stopexe” can be IO-toggle or Timer16 counts to the set values when clock sources of Timer16 come from IHRC, ILRC or EOSC modules.

                                                                        

Application industry

The products can be used in the following industries: power plant, paper making, steel, mining, rubber, water supply, cement, chemical industry, glass, printing

Textile, machinery, plastics, coatings, medicine, hospitals, food, hotels, scientific research institutions

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