Advantech SOM-A2552 UART2CTS, UART3TXD, UART2DTR, UART3CTS, UART2RI, UART3DTR, UART3RI, UART1DSR

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			User’s Manual for Advantech SOM-A2552 series module V1.00
116	UART2_CTS	I	UART2 Clear-to-Send signal pin. If	Pull high with
			user doesn’t need UART2 function,	100Kohm
			user could use this pin as GPIO.
			The pin connects to SoC PXA255
			GPIO44.
117	UART3_TXD	O	UART3 Transmit signal pin. If user	Pull high with
			doesn’t need UART3 function, user	100Kohm
			could use this pin as GPIO. The
			pin connects to SoC PXA255
			GPIO47.
118	UART2_DTR	O	UART Data-Terminal-Ready signal	Pull high with
			pin.	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	Pull high with
			signal pin.	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	Pull high with
			pin.	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	Pull high with
			pin.	100Kohm
128	UART1_TXD	O	UART1 Transmit signal pin.	Pull high with
				100Kohm
129	UART1_DTR	O	UART1 Data-Terminal-Ready	Pull high with
			signal pin.	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	No pulling
			can use this pin to control the LCD
			logic power MOS switch to achieve
			power-saving.
138	N.C.	-	N.C. just float this pin.	-
139	VEE_ENA	O	STN LCD VEE power control	No pulling
			signal. User can use this pin to

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