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User’s Manual for Advantech SOM-A2558 series module V1.00
24
function when transmitting or
receiving data. Active states see
LED configuration OP2: (power up
reset latch input) This pin is used
to control the forced or advertised
operating mode of the DM9161
according to the Table A. The
value is latched into the DM9161
registers at power-up/reset
134
TX+ O
10/100 BASE-
T transmit Data
positive pin.
No pulling
135
nSPEED_LED
O
Speed LED. Active states indicate
the 100Mbps mode. Active states
see LED configuration When bit 6
of Register 16 is set high, it
controls the SPEED LED as
100Base-TX SD signal output. For
debug only OP1: (power up reset
latch input) This pin is used to
control the forced or advertised
operating mode of the DM9161
according to the Table A. The
value is latched into the DM9161
registers at power-up/reset
Pull high w
ith
10Kohm
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
RX- I 10/100 BASE-T receive data
negative pin.
No pulling
139
VEE_ENA O
STN LCD VEE power control
signal. User can use this pin to
control STN LCD VEE power MOS
switch to achieve power-saving.
No pulling
140
RX+ I 10/100 BASE-T receive data
negative pin.
No pulling
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
USB_N2 IO
USB host port2 D- data line. No pulling
144
USB_P1 IO
USB host port1 D+ data line. No pulling
145
USB_P2 IO
USB host port2 D+ data line. No pulling
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