2: Functional Description
xPico® Embedded Device Server Integration Guide
26
LEDs
The xPico embedded device server contains several external signals that are intended to
drive external status LEDs. The LEDs are listed below. The signals may be connected
as shown in the reference schematic figure below.
Note:
The System LED usually remains
on
. When the
Default
button is pressed
for 5-6 seconds, the System LED starts blinking every second to indicate the
default button can be released to complete resetting the unit to factory default.
The unit reboots after release of the
Default
button. A lit WLAN LED indicates
the STA interface is associated with an access point.
Table 2-12 xPico Wi-Fi Status LED Output Signals
Signal
Pin Description
LED1/WI-FI LED
4
WI-FI Status LED, active low
SYSTEM_LED
20
System status LED, active high
Table 2-13 xPico Status LED Output Signals
Signal
Pin Description
LED0/SPEED
6
Ethernet speed LED, active low
LED1/LINK
4
Ethernet Link LED, active low
LED2/ACTIVITY
8
Ethernet Activity LED, active low
LED3/DUPLEX
14
Ethernet Duplex LED, active low
SYSTEM_LED
20
System status LED, active high
General Purpose I/O Pins
xPico and xPico Wi-Fi unit contains eight pins which may be used as configurable inputs
or outputs. Listed below are the configurable I/O pins. These pins are 3.3V CMOS logic
level and 5V input tolerant.
Table 2-14 Ethernet Interface xPico Serial Port Signals
Signal Pin Description for xPico Wired
Description xPico Wi-Fi
Reset
State
CP1
35
Configurable I/O
Configurable I/O
Input
CP2/INT 26 Configurable I/O-External interrupt
input
Configurable I/O-SPI interrupt
input
Input
CP3
28
Configurable I/O
Configurable I/O-SPI MISO
Input
CP4
30
Configurable I/O
Configurable I/O-SPI MOSI
Input
CP5
32
Configurable I/O
Configurable I/O
Input
CP6
34
Configurable I/O
Configurable I/O
Input
CP7
27
Configurable I/O
Configurable I/O-SPI Clock
Input
CP8
3
Configurable I/O
Configurable I/O-SPI Chip Select
Input
Note 1. For xPico Wi-Fi 5V tolerant pins, in order to sustain a voltage higher than Vcc+0.3, the internal pull-up/ pull-down resistors must be disabled.
