Your ePlatform Partner
User’s Manual for Advantech SOM-A2552 series module V1.00
22
116
UART2_CTS I UART2 Clear-to-Send sign
al pin. If
user doesn’t need UART2 function,
user could use this pin as GPIO.
The pin connects to SoC PXA255
GPIO44.
Pull high with
100Kohm
117
UART3_TXD O
UART3 Transmit signal pin. If user
doesn’t need UART3 function, user
could use this pin as GPIO. Th
e
pin connects to SoC PXA255
GPIO47.
Pull high with
100Kohm
118
UART2_DTR
O
UART Data-Terminal-
Ready signal
pin.
Pull high with
100Kohm
119
UART3_CTS I UART3 Clear-to-Send signal pin.
Pull high with
100Kohm
120
UART2_RI I UART2 Ring Indicator signal pin.
Pull high with
100Kohm
121
UART3_DTR
O
UART3 Data-Terminal-Ready
signal pin.
Pull high with
100Kohm
122
UART3_RI I UART3 Ring Indicator signal pin.
Pull high with
100Kohm
123
UART1_DSR
I UART1 Data-Set-Ready signal pin.
Pull high with
100Kohm
124
UART1_DCD
I UART1 Data-Carrier-Detect signal
pin.
Pull high with
100Kohm
125
UART1_CTS I UART1 Clear-to-Send signal pin.
Pull high with
100Kohm
126
UART1_RXD
I UART1 Receive signal pin.
Pull high with
100Kohm
127
UART1_RTS O
UART1 Request-to-Send signal
pin.
Pull high with
100Kohm
128
UART1_TXD O
UART1 Transmit signal pin.
Pull high with
100Kohm
129
UART1_DTR
O
UART1 Data-Terminal-Ready
signal pin.
Pull high with
100Kohm
130
GND P Ground -
131
UART1_RI I UART Ring Indicator signal pin.
Pull high with
100Kohm
132
N.C. - N.C. just float this pin. -
133
N.C. - N.C. just float this pin. -
134
N.C. - N.C. just float this pin. -
135
N.C. - N.C. just float this pin. -
136
GND P Ground -
137
VDD_ENA O
LCD power control signal. User
can use this pin to control the LCD
logic power MOS switch to achieve
power-saving.
No pulling
138
N.C. - N.C. just float this pin. -
139
VEE_ENA O
STN LCD VEE power control
signal. User can use this pin to No pulling