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4.5.5 I
R
NTERRUPT
Reading this port clears the interrupt.
IRQST1
IRQST2
4.6 50-Pin Ribbon Cable Pinout
EAD
(D0) Interrupt status
(D4) Interrupt status
Description
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
C0
C1
C2
C3
C4
C5
C6
C7
GND
+5 V
CHAPTER 4: Technical Description
1 = interrupt pending, 0 = none
1 = interrupt pending, 0 = none
Pin #
Port A
47
45
43
41
39
37
35
33
Port B
31
29
27
25
23
21
19
17
Port C
15
13
11
9
7
5
3
1
All even pins
49
15
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