mg84fl54b Megawin Technology, mg84fl54b Datasheet - Page 39

• Manufacturer Part Number: mg84fl54b
• Description: Full-speed Usb Micro-controller
• Manufacturer: Megawin Technology

13. Additional External Interrupts (INT2 and INT3)
The device has two additional external interrupt inputs: INT2 (P3.6) and INT3 (P3.7). They are identical to /INT0
(P3.2) or /INT1 (P3.3) except the edge-triggered type (ITx=1) can be programmed to be rising-edge or falling-
edge activated, and level-triggered type (ITx=0) can be programmed to be high-level or low-level activated. The
following special function registers are related to their operation.
XICON (Address=C0H, External Interrupt Control Register)
IL3: External interrupt 3 level control bit. 1: rising-edge/high-level activated; 0: falling-edge/low-level activated.
EX3: External interrupt 3 enable bit.
IE3: External interrupt 3 interrupt flag.
IT3: External interrupt 3 type control bit. 1: edge-triggered; 0: level-triggered.
IL2: External interrupt 2 level control bit. 1: rising-edge/high-level activated; 0: falling-edge/low-level activated.
EX2: External interrupt 2 enable bit.
IE2: External interrupt 2 interrupt flag.
IT2: External interrupt 2 type control bit. 1: edge-triggered; 0: level-triggered.
IP (Address=B8H, Interrupt Priority Register)
PX3: External interrupt 3 priority bit.
PX2: External interrupt 2 priority bit.
PT2: Timer 2 interrupt priority bit.
PS: Serial Port interrupt priority bit.
PT1: Timer 1 interrupt priority bit.
PX1: External interrupt 1 priority bit.
PT0: Timer 0 interrupt priority bit.
PX0: External interrupt 0 priority bit.
MEGAWIN
PX3
IL3
7
7
EX3
PX2
6
6
PT2
IE3
5
5
IT3
PS
4
4
MG84FL54B Data sheet
PT1
IL2
3
3
EX2
PX1
2
2
PT0
IE2
1
1
PX0
IT2
0
0
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