User's Manual

LE920 Hardware User Guide
1vv0301026 Rev.8 2015-01-03
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Reserved. Page 60 of 88
10.4. Wi-Fi (SDIO) control Interface
The LE920 has an integrated SW driver for supporting Qualcomm QCA6053 Wi-Fi chipset via
a 2
nd
dedicated SD bus interface.
The secondary SD bus interface can be used only with the QCA6053 chipset, and can’t be used
as external SD/MMC card connection.
For detailed explanation, refer to Telit 80407NT11289A - xE920 - Wi-Fi interface Application
Note
PAD
Signal
I/O
Function
Type
COMMENT
AB3
WiFi_SD_CMD
O
Wi-Fi SD Command
1.8V
AM3
WiFi_SD_CLK
O
Wi-Fi SD Clock
1.8V
AD3
WiFi_SD _DATA0
I/O
Wi-Fi SD Serial Data 0
1.8V
AF3
WiFi_SD _DATA1
I/O
Wi-Fi SD Serial Data 1
1.8V
AH3
WiFi_SD _DATA2
I/O
Wi-Fi SD Serial Data 2
1.8V
AK3
WiFi_SD _DATA3
I/O
Wi-Fi SD Serial Data 3
1.8V
Y3
WiFi_RST_Ctr
O
Wi-Fi Reset output control / Power enable control
1.8V
Active Low
WARNING:
Wi-Fi (SDIO) control interface is fully supported in LE920-EU and LE920-NA.
However, in some cases isn’t supported in LE920-EUG and LE920-NAG.
If Wi-Fi control is required for LE920-NAG or LE920-NAG, please contact your local Telit
rep. or contact customer support for specific ordering info.
NOTE:
Wifi_RST_Ctr’ should have an optional Pull-up resistor to 1.8V on the host
application, to disable Wi-Fi reset function if needed