M
X
3
W
-
E
3
/
M
X
3
M
X
3
W
-
E
3
/
M
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
3.3V
GPO21
GPO19
W
-
V
3
W
-
V
3
u
r
p
o
s
e
O
u
t
p
u
t
u
r
p
o
s
e
O
u
t
p
u
t
1
2
NC
GND
5
6
)
C
o
n
n
e
c
t
o
r
)
C
o
n
n
e
c
t
o
r
57
O
n
l
i
n
e
M
a
n
u
a
l
O
n
l
i
n
e
M
a
n
u
a
l