SN8F2280 Series
USB 2.0 Full-Speed 8-Bit Micro-Controller
6
INTERRUPT
6.1 OVERVIEW
This MCU provides 15 interrupt sources, including 11 internal interrupt (T0/T1/TC0/TC1/TC2/USB/SIO/MSP/UART/AD/
IO wakeup) and 4 external interrupt (INT0/INT1/P0/P1). The external interrupt can wakeup the chip while the system is
switched from power down mode to high-speed normal mode. Once interrupt service is executed, the GIE bit in STKP
register will clear to “0” for stopping other interrupt request. On the contrast, when interrupt service exits, the GIE bit will
set to “1” to accept the next interrupts’ request. All of the interrupt request signals are stored in INTRQ register.
Note: The GIE bit must enable during all interrupt operation.
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