EVK-ELLA-W1 - User Guide
UBX-15012877 - R04
Early Production Information
Board description
Page 9 of 24
3.3
Configuration
The dual-row pin header J4 is used for configuration purposes and to access digital I/O pins of the ELLA-W1
module as detailed in Table 5.
Configuration setting (J4)
Description
1-2 bridged
ELLA-W1 digital I/O pin LED_1 is used to drive the blue LED
1-2 open
Access to ELLA-W1 digital I/O pin LED_1 on pin 2
3-4 bridged
Pull down ELLA-W1 digital I/O pin CFG; Use of sleep clock is disabled
3-4 open
ELLA-W1 digital I/O pin CFG is left open; Operation with sleep clock is configured
5-6 bridged
ELLA-W1 digital I/O pin LED_0 is used to drive the orange LED
5-6 open
Access to ELLA-W1 digital I/O pin LED_0 on pin 5
7-8 bridged
Green LED connected to 3V3, indicating active supply
7-8 open
Green LED disconnected; LED will not contribute to overall current consumption
9-10 bridged
On-board oscillator for 32.768 kHz sleep clock is powered from 1V8 supply
9-10 open
On-board oscillator for 32.768 kHz sleep clock is not powered for sleep clock-less operation
(requires 3-4 to be bridged)
Table 5: Configuration pin header
3.4
Connectors
Table 6 lists the available connectors on the EVB-ELLA-W1 evaluation board and their functions. Refer to the
schematic in section 3.7 for details on the pin assignment.
Function
Description
Name
SDIO host interface
Pin header for connecting the SDIO adapter board
J1/SDIO
PCM interface
Pin header for digital audio PCM interface for voice applications
J3/PCM
Primary external antenna
connector
U.FL coaxial connector for external 2.4/5 GHz Wi-Fi antenna (and Bluetooth on EVB-ELLA-W161);
disconnected by default – populate R2 instead of R1 to use it
J7
Secondary external antenna
connector
U.FL coaxial connector for external 2.4 GHz Bluetooth antenna (only used on EVB-ELLA-W163);
disconnected by default – populate R10 instead of R9 to use it
J8
Table 6: EVB-ELLA-W1 Connectors description
3.5
LEDs
Table 7 lists the available LEDs on the EVB-ELLA-W1 evaluation board. In the default configuration, the LEDs are
used for status indication of the power supply and for showing Wi-Fi/Bluetooth activity.
Function
Description
Name
Color
Main power
Main power supply (3V3)
D1
Green
Wi-Fi activity
Blinking LED shows Wi-Fi Rx/Tx activity (depends on firmware)
D2
Orange
Bluetooth activity
Blinking LED shows Bluetooth Rx/Tx activity (depends on firmware)
D3
Blue
Table 7: LED description
3.6
Reset button
The reset button (S4) on the evaluation board resets the ELLA-W1 module.