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