16
(4) COM3/COM4 (9-Pin):
RS232
Serial Port Headers
Serial Port Header
DCD
Pin1
Pin6
Pin5
SI
N
S
OU
T
DT
R
GN
D
DS
R
RT
S
CT
S
RI
(5) GPIO (10-pin): GPIO Header
9
GP
IO
_80
G
ND
GP
IO
_82
GP
IO
_84
GP
IO
_86
GP
IO
_81
GP
IO
_83
2
Pin 1
10
V
CC
GP
IO
_85
GP
IO
_87