SBC Axel SBC/Interfaces and Connectors/DWM

History
ID#	Issue Date	Notes
13426	07/04/2021	First DESK release

DWM

Description

J24 is a 30-pins 0.50mm Pitch SlimStack™ Receptacle. This connector is dedicated to the DWM optional add-on module.

The module is built around an LS Research TiWi-BLE Integrated Transceiver Modules for WLAN 802.11 b/g/n and Bluetooth. The module implements the necessary PHY/MAC layers to support WLAN applications in conjunction with a host processor over a SDIO interface. The module also provides a Bluetooth platform through the HCI transport layer. Both WLAN and Bluetooth share the same antenna port.

DWM connector

Signals

The following table describes the interface signals:

Pin#	SOM Pin#	Pin name	Pin function	Pin Notes
1, 2	-	5V
3, 4	-	3.3V
5, 6, 9, 10, 19	-	DGND	Ground
7	J10.69	TIWI_MMC2_CMD
8	J10.71	TIWI_MMC2_CLK
11	J10.61	TIWI_MMC2_DAT0
13	J10.63	TIWI_MMC2_DAT1
15	J10.65	TIWI_MMC2_DAT2
17	J10.67	TIWI_MMC2_DAT3
21	J10.47	UART2_RX		Used only for BT peripheral
23	J10.55	UART2_CTS		Used only for BT peripheral
24	J10.39	TIWI_BT_F5
25	J10.49	UART2_TX		Used only for BT peripheral
26	J10.41	TIWI_BT_F2
27	J10.59	UART2_RTS		Used only for BT peripheral
28	J10.43	TIWI_IRQ
29	J10.99	TIWI_BT_EN
30	J10.45	TIWI_EN
12, 14, 16, 18, 20, 22	-	N.C.	Not connected

Device mapping

The WiFi peripheral is mapped to the corresponding wlan<X> device in Linux. The network peripheral is visible under the ifconfig network configuration utility.

Device usage

The peripheral is used the standard kernel interface and network protocol stack.

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