Product Specs

20 GPIO — General purpose input/output
Page
129
Bit number
31 30
29
28
27
26
25
24
23 22 21 20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Id
f e
d
c
b
a
Z
Y
X W V U
T
S
R
Q
P
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Reset 0x00000000
0 0
0
0
0
0
0
0
0 0 0 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Id
RW Field
Value Id
Value
Description
Output
1
Read: pin set as output
Clear
1
Write: writing a '1' sets pin to input; writing a '0' has no effect
J
RW
PIN9
Input
0
Set as input pin 9
Read: pin set as input
Output
1
Read: pin set as output
Clear
1
Write: writing a '1' sets pin to input; writing a '0' has no effect
K
RW
PIN10
Input
Output
Clear
0
1
1
Set as input pin 10
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
L
RW
PIN11
Input
Output
Clear
0
1
1
Set as input pin 11
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
M
RW
PIN12
Input
Output
Clear
0
1
1
Set as input pin 12
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
N
RW
PIN13
Input
Output
Clear
0
1
1
Set as input pin 13
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
O
RW
PIN14
Input
Output
Clear
0
1
1
Set as input pin 14
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
P
RW
PIN15
Input
Output
Clear
0
1
1
Set as input pin 15
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
Q
RW
PIN16
Input
Output
Clear
0
1
1
Set as input pin 16
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
R
RW
PIN17
Input
Output
Clear
0
1
1
Set as input pin 17
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
S
RW
PIN18
Input
Output
Clear
0
1
1
Set as input pin 18
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
T
RW
PIN19
Input
Output
Clear
0
1
1
Set as input pin 19
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
U
RW
PIN20
Input
Output
Clear
0
1
1
Set as input pin 20
Read: pin set as input
Read: pin set as output
Write: writing a '1' sets pin to input; writing a '0' has no effect
V
RW
PIN21
Input
0
Set as input pin 21
Read: pin set as input
Output
1
Read: pin set as output
Clear
1
Write: writing a '1' sets pin to input; writing a '0' has no effect
W
RW
PIN22
Set as input pin 22