Advantech RISC SOM-A2558 - Manual (Page 24)

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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 with
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