Wifi Sdio Interface - Teli LE910C1-NA Design Manual

LE910Cx HW User Guide
PAD Signal
VMMC
F13
Table 31: SD Card Signals
Figure 18 shows the recommended connection diagram of the SD interface.
VMMC External PS 3V
GND
MicroSD
MMC_CD
GND
Figure 20: SD/MMC Interface Connectivity
Note:
The power supply to the SD/MMC card must be supplied from the
Host application board. The LE910Cx does not provide a dedicated
power supply for the SD/MMC card.
The VMMC Supply is limited to 50mA so it can only supply the MMC
card external pull-up resistors.
The Pull-up resistors must be placed on the host application board.
The card detection input has an internal pull-up resistor.
VMMC can be used to enable the external power supply (LDO Enable
signal)
8.5.4.

WiFi SDIO Interface

The LE910Cx provides an SDIO port supporting the SDIO3.0 specification, which can be
used to interface with a WiFi chipset (Qualcomm QCA65x4 chipset or other WiFi
solutions). The LE910Cx module includes an integrated SW driver to support the
Qualcomm QCA6574 chipset.
1VV0301298 Rev. 33
I/O
- Power supply for
MMC card pull-up
resistors
C=100nF
10 10
K K
DATA2
DATA3
CMD
VDD
VSS
DATA0
DATA1
GND
SD/MMC is only supported on the Linux side.
Page 76 of 128
Not Subject to NDA
Function Type
1.8/2.95V
10
10 10
K
K K
SD/MMC_DATA2
SD/MMC_DATA3
SD/MMC_CMD
SD/MMC_CLK
SD/MMC_DATA0
SD/MMC_DATA1
SD/MMC_CD
Comments
Max Current is
50mA
LE910Cx
SD/MMC Interface
2021-06-29