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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)
1-2 bridged
1-2 open
3-4 bridged
3-4 open
5-6 bridged
5-6 open
7-8 bridged
7-8 open
9-10 bridged
9-10 open
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
SDIO host interface
PCM interface
Primary external antenna
connector
Secondary external antenna
connector
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
Main power
Main power supply (3V3)
Wi-Fi activity
Blinking LED shows Wi-Fi Rx/Tx activity (depends on firmware)
Bluetooth activity
Blinking LED shows Bluetooth Rx/Tx activity (depends on firmware)
Table 7: LED description
3.6 Reset button
The reset button (S4) on the evaluation board resets the ELLA-W1 module.
UBX-15012877 - R04
Description
ELLA-W1 digital I/O pin LED_1 is used to drive the blue LED
Access to ELLA-W1 digital I/O pin LED_1 on pin 2
Pull down ELLA-W1 digital I/O pin CFG; Use of sleep clock is disabled
ELLA-W1 digital I/O pin CFG is left open; Operation with sleep clock is configured
ELLA-W1 digital I/O pin LED_0 is used to drive the orange LED
Access to ELLA-W1 digital I/O pin LED_0 on pin 5
Green LED connected to 3V3, indicating active supply
Green LED disconnected; LED will not contribute to overall current consumption
On-board oscillator for 32.768 kHz sleep clock is powered from 1V8 supply
On-board oscillator for 32.768 kHz sleep clock is not powered for sleep clock-less operation
(requires 3-4 to be bridged)
Description
Pin header for connecting the SDIO adapter board
Pin header for digital audio PCM interface for voice applications
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
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
Early Production Information
EVK-ELLA-W1 - User Guide
Name
Color
D1
Green
D2
Orange
D3
Blue
Board description
Name
J1/SDIO
J3/PCM
J7
J8
Page 9 of 24
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