Maxim Integrated MAXQ Family - Manual (Page 65)

6.5.8 (Type D) External Interrupt Edge Select Register (EIESx)
Bit 7: Interrupt 7 Edge Select (IT7). This bit selects the edge detection mode for external interrupt 7.
0 = INT7 is positive-edge triggered
1 = INT7 is negative-edge triggered
Bit 6: Interrupt 6 Edge Select (IT6). This bit selects the edge detection mode for external interrupt 6.
0 = INT6 is positive-edge triggered
1 = INT6 is negative-edge triggered
Bit 5: Interrupt 5 Edge Select (IT5). This bit selects the edge detection mode for external interrupt 5.
0 = INT5 is positive-edge triggered
1 = INT5 is negative-edge triggered
Bit 4: Interrupt 4 Edge Select (IT4). This bit selects the edge detection mode for external interrupt 4.
0 = INT4 is positive-edge triggered
1 = INT4 is negative-edge triggered
Bit 3: Interrupt 3 Edge Select (IT3). This bit selects the edge detection mode for external interrupt 3.
0 = INT3 is positive-edge triggered
1 = INT3 is negative-edge triggered
Bit 2: Interrupt 2 Edge Select (IT2). This bit selects the edge detection mode for external interrupt 2.
0 = INT2 is positive-edge triggered
1 = INT2 is negative-edge triggered
Bit 1: Interrupt 1 Edge Select (IT1). This bit selects the edge detection mode for external interrupt 1.
0 = INT1 is positive-edge triggered
1 = INT1 is negative-edge triggered
Bit 0: Interrupt 0 Edge Select (IT0). This bit selects the edge detection mode for external interrupt 0.
0 = INT0 is positive-edge triggered
1 = INT0 is negative-edge triggered
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MAXQ Family User’s Guide
Bit # 7 6 5 4 3 2 1 0
Name IT7 IT6 IT5 IT4 IT3 IT2 IT1 IT0
Reset 0 0 0 0 0 0 0 0
Access rw rw rw rw rw rw rw rw
r = read, w = write
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