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A
X
3
S
M
a
x
/
A
X
3
A
X
3
S
M
a
x
/
A
X
3
G
P
O
(
G
e
n
e
r
a
l
P
G
P
O
(
G
e
n
e
r
a
l
P
GPO (General Purpose Output) is an advanced specification developed by AOpen for power users to define the further
function by oneself. For example, you can design a daughter board to provide additional capabilities, such as an alarm, a buzzer,
a timekeeper, etc.
Pin 1
1
6
3.3V
GPO19
NC
GPO20
GND
3
4
S
P
l
u
s
I
I
-
U
S
P
l
u
s
I
I
-
U
u
r
p
o
s
e
O
u
t
p
u
t
)
u
r
p
o
s
e
O
u
t
p
u
t
)
C
o
n
n
e
c
t
o
r
C
o
n
n
e
c
t
o
r
65
O
n
l
i
n
e
M
a
n
u
a
l
O
n
l
i
n
e
M
a
n
u
a
l
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