The software reset is executed by changing FCF  (SWR) from ‘0’ to ‘1’. Software reset will reset the program counter to address 0000H. All SFR registers will be set to their reset values, except FCF  (SWR), WDTC  (WDTS), and RAM data will not be altered.
• Interrupt priority and polling sequence
The device supports eight interrupt sources under a four level priority scheme. It summarizes the polling sequence of the supported interrupts. Note that the SPI serial interface and the UART share the same interrupt vector.