-12-
PN
11
POS
keyboard connector
(
/dev/ttySC0
)
#
Signal
Function
1 VCC_3.3
VCC
3.3V
2 RXD0
Receive
data
(TTL
3.3
v)
I
3 TXD0
Transmit
data
(TTL
3.3
v)
O
4 GND
Signal
GND
PN12
USB
terminal
#
Signal
Function
1 VCC
VCC
5
V
2 DATA+
Signal
line
I/O
3 DATA-
Signal
line
I/O
4 GND
Signal
GND
PN
13
POS
customer display connector
(
/dev/ttySC2
)
#
Signal
Function
1 VCC_5
VCC5V
2 TxD
Transmit
data
O
3 GND
Signal
GND
PN
14 Touch panel
IF
#
Signal
Function
1 TPYD
Y
sensor -
I
2 PPYD
Y
direction
-
O
3 PPYP
Y
direction
+
O
4 TPYU
Y
sensor
+
I
5 TPXR
Y
sensor
+
I
6 TPXL
Y
sensor
-
I
7 PPXP
X
direction
+
O
8 PPXD
X
direction
-
O