Preliminary
SN8P1702A/SN8P1703A
8-bit micro-controller build-in 12-bit ADC
9INTERRUPT
OVERVIEW
The SN8P1702A/SN8P1703A provides 3 interrupt sources, including two internal interrupts (TC0, TC1) and one
external interrupts (INT0 ). The external interrupt can wakeup the chip from power down mode to high-speed normal
mode. The external clock input pins of INT0 are shared with P0.0 pins. Once interrupt service is executed, the GIE bit
in STKP register will clear to “0” for stopping other interrupt request. 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. The user can
program the chip to check INTRQ’s content for setting executive priority.
INTEN Interrupt enable register
TC0IRQ
TC0 time out
TC1IRQ
P00IRQ
Interrupt vector address (0008H)
Global interrupt request signal
TC1 time out
INT0 trigger
INTRQ
3-bit
Latchs
Interrupt
enable
gating
Figure 9-1. The 7 Interrupts
ꢀ
Note: The GIE bit must enable and all interrupt operations work.
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