2: Functional Description
xPico® Embedded Device Server Integration Guide
17
Signal Name
xPico
Pin #
Primary Function
Reset
State
Internal
Pull-up
Driver
Strength
CP7
27
Configurable I/O
Input
Active 56K
to 122K
4mA
CP3
28
Configurable I/O
Input
Active 56K
to 122K
4mA
3V3
29
3.3V Input Power
CP4
30
Configurable I/O
Input
Active 56K
to 122K
4mA
3V3
31
3.3V Input Power
CP5 32
Configurable
I/O Input
10K
4mA
3V3
33
3.3V Input Power
CP6 34
Configurable
I/O Input
10K
4mA
CP1
35
Configurable I/O
Input
Active 56K
to 122K
4mA
DEFAULT#
36
Unit reset to default, active
low.
Drive low to reset unit to
default settings.
Input Active
56K
to 122K
GND 37
Signal
Ground
EXT_RESET#
38
Unit hardware reset, active
low. Drive low to reboot unit.
Input 10K
GND 39
Signal
Ground
GND 40
Signal
Ground
Table 2-4 xPico Wi-Fi PCB Interface Signals
Signal Name
xPico
Pin #
Primary Function
Reset
State
Internal
Pull-up
/Pull-
down
Driver
Strength
GND 1
Signal
Ground
GND 2
Signal
Ground
CP8/SPI_CS
1
3
Configurable I/O/ SPI Chip
Select
Input,
floating
30K to 50K 8mA
LED1/WLAN_LED
4
WLAN Link, active low
Input,
floating
30K to 50K 8mA
RTS1
7
5
Serial ready to send/ serial
transmit enable
Input,
floating
30K to 50K 8mA
NC 6
No
Connect
RXD1
7
Serial receive data input 1
Input,
floating
30K to 50K
NC 8
No
Connect
GND 9
Signal
Ground
TXD1
10
Serial transmit data output 1
Input,
30K to 50K 8mA