Maxq family user’s guide: maxq8913 supplement – Maxim Integrated MAXQ Family Users Guide: MAXQ8913 Supplement User Manual
Page 39
MAXQ Family User’s Guide:
MAXQ8913 Supplement
6-7
6.1.12 External Interrupt Edge Select 0 Register (EIES0, M0[0Ah])
Each bit in this register controls the edge select mode for an external interrupt as follows:
0 = The external interrupt triggers on a rising (positive) edge.
1 = The external interrupt triggers on a negative (falling) edge.
Bit 7: Edge Select for External Interrupt 7 (IT7)
Bit 6: Edge Select for External Interrupt 6 (IT6)
Bit 5: Edge Select for External Interrupt 5 (IT5)
Bit 4: Edge Select for External Interrupt 4 (IT4)
Bit 3: Edge Select for External Interrupt 3 (IT3)
Bit 2: Edge Select for External Interrupt 2 (IT2)
Bit 1: Edge Select for External Interrupt 1 (IT1)
Bit 0: Edge Select for External Interrupt 0 (IT0)
6.1.13 External Interrupt Edge Select 1 Register (EIES1, M0[0Bh])
Each bit in this register controls the edge select mode for an external interrupt as follows:
0 = The external interrupt triggers on a rising (positive) edge.
1 = The external interrupt triggers on a negative (falling) edge.
Bits 7:4: Reserved
Bit 3: Edge Select for External Interrupt 11 (IT11)
Bit 2: Edge Select for External Interrupt 10 (IT10)
Bit 1: Edge Select for External Interrupt 9 (IT9)
Bit 0: Edge Select for External Interrupt 8 (IT8)
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
Bit #
7
6
5
4
3
2
1
0
Name
—
—
—
—
IT11
IT10
IT9
IT8
Reset
0
0
0
0
0
0
0
0
Access
r
r
r
r
rw
rw
rw
rw
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