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User’s Manual for Advantech SOM-A2552 series module V1.00
23
control STN LCD VEE power MOS
switch to achieve power-saving.
140
N.C. - N.C. just float this pin. -
141
VBK_ENA O
LCD back light inverter power
control signal. User can use this
pin to control the LCD backlight
inverter to achieve power-saving.
No pulling
142
USB_N1 IO
USB host port1 D- data line. No pulling
143
N.C. - N.C. just float this pin. -
144
USB_P1 IO
USB host port1 D+ data line. No pulling
145
N.C. - N.C. just float this pin. -
146
N.C. - N.C. just float this pin. -
147
N.C. - N.C. just float this pin. -
148
UART5_RXD
I UART5 Receive signal pin.
Pull high with
100Kohm
149
UART4_RXD
I UART5 Receive signal pin.
Pull high with
100Kohm
150
UART5_RTS O
UART5 Data-Terminal-
Ready
signal pin.
Pull high with
100Kohm
151
UART4_TXD O
UART4 Transmit signal pin.
Pull high with
100Kohm
152
UART5_TXD O
UART5 Transmit signal pin.
Pull high with
100Kohm
153
N.C. - N.C. just float this pin. -
154
N.C. - N.C. just float this pin. -
155
N.C. - N.C. just float this pin. -
156
N.C. - N.C. just float this pin. -
157
nVBRIR_INC
O
One of LCD inverter backlight
brightness control signals.
nVBRIR_INC is used to i
ncrease
or decrease Wiper Control.
Advantech suggests to connect the
pin to DS1804 1st pin.
No pulling
158
CRT_R AO
The red CRT output. No pulling
159
nVBRIR_UnD
O
One of LCD inverter backlight
brightn
ess control signals.
nVBRIR_UnD is used be
Up/Down
Control. Advantech suggests to
connect the pin to DS1804 2nd pin.
No pulling
160
CRT_G AO
The Green CRT output. No pulling
161
VBRIR_CS O
One of LCD inverter backlight
brightness control signals.
VBRIR_CS
is used be chip select
pin
. Advantech suggests to
connect the pin to DS1804 7th pin.
No pulling
162
CRT_B AO
The blue CRT output. No pulling
163
nVCONR_INC
O
One of STN LCD contrast control
signals. nVCONR_INC
is used be
increase/decrease Wiper Control
No pulling