W921E400A Datasheet, PDF (30/53 Pages) Winbond – 4-BIT MICROCONTROLLER

W921E400A/W921C400
6.11 Interrupt
There are seven interrupt sources (two external and five internal sources) in the
W921E400A/W921C400. All the pins of external sourcesÄINT0 (P4.3) and port P4.2Äare falling edge
active. The priority of those interrupts is INT0 > TM0 > TM2 > ( Comparator / TM3 ) > P4.2 >
SERIAL.
6.11.1 Interrupt Control Register
Which interrupt is enabled is controlled by the interrupt control register1 to 3 (INTCT1 to INTCT3).
The formats are shown below:
INTCT1 register: (address = 039H, default data = 0H)
b3
b2
b1
b0
Reserved
0: TM0 interrupt disable
1: TM0 interrupt enable
0: TM2 interrupt disable
1: TM2 interrupt enable
0: TM3 interrupt disable
1: TM3 interrupt enable
INTCT2 register: (address = 03AH, default data = 0H)
b3
b2
b1
b0
Reserved
0: INT0 pin interrupt disable
1: INT0 pin interrupt enable
0: Serial port interrupt disable
1: Serial port interrupt enable
0: Comparator interrupt disable
1: Comparator interrupt enable
INTCT3 register: (address = 03BH, default data = 0H)
b3
b2
b1
b0
Reserved
Reserved
Reserved
0: Pin P4.2 interrupt disable
1: Pin P4.2 interrupt enable
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