Ground connections

ANT1

RF I/O port chain0, dual band Wi-Fi

ANT2

RF I/O port chain0, dual band Wi-Fi

ANT3 (RF_BT)

Reserved for BT RF I/O port, used only by the 3rd

antenna functionary

GPIO5. G_BT

If not used keep NC.

Do not connect to GND.

SD_RESET

Reset Pin for SDIO interface

ON: pull high; OFF: pull low

Low for disable SDIO interface

WL_WAKE_HOST

GPIO10.

WLAN to wake-up HOST

SDIO_CMD

SDIO command line

SDIO_ CLK

SDIO clock line

SDIO_DATA3

SDIO data line 3

SDIO_DATA2

SDIO data line 2

SDIO_DATA0

SDIO_DATA1

SDIO data line 1

NC

No connect

PCM sync signal

PCM data input

PCM Data output

PCM clock

External Low Power Clock input (32.768KHz)

If not used keep NC

NC

No connect

VDDIO

I/O Voltage supply input 1.8V or 3.3V

NC

No connect

VCC33

Main power voltage source input 3.3V

NC

No connect

BT_DIS_N

Enable pin for Bluetooth device

ON: pull high; OFF: pull low

External pull low to shut down BT

UART_TXD

Bluetooth UART interface

UART_RXD

Bluetooth UART interface

UART_RTS

Bluetooth UART interface

UART_CTS

Bluetooth UART interface

WL_DIS_N

Enable pin for WLAN Radio

ON: pull high; OFF: pull low

External pull low to disable WLAN Radio

G_WL

GPIO4, G_WL

If not used keep NC.

Do not pull high on this pin.

NC

No connect

HOST_WAKE_BT

HOST wake-up Bluetooth device

BT_WAKE_HOST

Bluetooth device to wake-up HOST