2: Functional Description
xPico® Embedded Device Server Integration Guide
15
PCB Interface
The xPico embedded device servers has a serial interface compatible with data rates up
to 921,600 bps (in high-performance mode). The serial signals (
RX, TX, RTS, CTS, and all
CPs
) are 3.3V CMOS logic level and 5V tolerant. The serial interface pins i3.3V,
ground, and reset. The serial signals usually connect to an internal device, such as a
UART. For applications requiring an external cable running with RS-232 or RS422/485
voltage levels, the xPico device must interface to a serial transceiver chip. All
configurable I/O pins are 3.3V CMOS logic level and 5V input tolerant. The xPico unit
requires a mating connector. Customers should layout their PCB for Hirose part number
DF40C(2.0)-40DS-0.4V(51).
An external Ethernet magnetic module and RJ45 is required to interface the xPico
embedded device server to a standard 10/100Mbps Ethernet network.
An external antenna attached to the xPico Wi-Fi U.FL connector is required to connect to
an 802.11b/g/n wireless network.
Shown below is the xPico pin connection diagram highlighting the differences between
the xPico and xPico Wi-Fi embedded device server.
Table 2-2 xPico and xPico Wi-Fi Pin Connections
Pin#
xPico Wired
xPico Wi-Fi
Pin#
xPico Wired
xPico Wi-Fi
1 GND
GND
2 GND
GND
3 CP8
CP8/SPI_CS
4 LED1/LINK
LED1/WLAN_LED
5 RTS1
RTS1
6 LED0/SPEED
NC
7 RXD1
RXD1
8 LED2/ACTIVITY
NC
9 GND
GND
10 TXD1
TXD1
11 ETX-
NC
12 ETCT
NC
13 ETX+
NC
14 LED3/DUPLEX(OUT)
WKUP (IN)
15 GND
GND
16 CTS1
CTS1
17 ERX-
NC
18 ERCT
NC
19 ERX+
NC
20 SYS_LED
SYS_LED
21 GND
GND
22 Reserved
DDP
23 RXD2
RXD2
24 Reserved
DDM
25 TXD2
TXD2
26 CP2/INT
CP2/SPI_INT
27 CP7
CP7/SPI_SCK
28 CP3
CP3/MISO
29 +3.3V
+3.3V
30 CP4
CP4/MOSI
31 +3.3V
+3.3V
32 CP5
CP5
33 +3.3V
+3.3V
34 CP6
CP6
35 CP1
CP1
36 DEFAULT#(IN)
DEFAULT#(IN)
37 GND
GND
38 EXT_RESET#(IN)
EXT_RESET#(IN)
39 GND
GND
40 GND
GND
