User's Manual

Pin No Pin Name Description Type
20 BT_RST_N Low Asserting Reset for Bluetooth Core. I
21 GND Ground
22 WL_RST_N Low asserting reset for WLAN. I
23 NC No Connect
24 VBAT3V3_IN Power supply for Internal regulators I
25 NC No Connect
26 GND Ground
27 GND Ground
28 VDDIO Digital I/O power supply for WL/BT/FM (1.8V~3.3V) I
29 GND Ground
30 NC No Connect
31 NC No Connect
32 NC No Connect
33 NC No Connect
34 GND Ground
35 GND Ground
36 NC No Connect
37 SDIO_DATA2_SPI_NC
SDIO 4-bit Mode: Data line 2 or Read Wait
SDIO 1-bit Mode: Read Wait
This pin has an internal weak pull-up resistor. The resistor is enabled by
default but can be disabled by software. The value of the pull-up depends
on the VDDIO_SD supply voltage. For 1.8V, the resistance range is 30–
82 k Ohms. For 2.6V, it ranges from 21–41 k Ohms. For 3.3V, it ranges
from 15–35 k Ohms .
I/O
38 NC No Connect
39 SDIO_CLK_SPI_CLK SDIO Clock (Pin definition for module side) I
40 GND Ground
41 SDIO_DATA3_SPI_CS
SDIO 4-bit Mode: Data line 3
SDIO 1-bit Mode: Not used
This pin has an internal weak pull-up resistor. The resistor is enabled by
default but can be disabled by software. The value of the pull-up depends
on the VDDIO_SD supply voltage. For 1.8V, the resistance range is 30–
82 k Ohms. For 2.6V, it ranges from 21–41 k Ohms. For 3.3V, it ranges
from 15–35 k ohms
I/O
42 WL_SHUTDOWN_N Low asserting reset for WLAN core. I
43 SDIO_DATA1_SPI_IRQ
SDIO 4-bit Mode: Data line 1 or Interrupt
SDIO 1-bit Mode: Interrupt
This pin has an internal weak pull-up resistor. The resistor is enabled by
default but can be disabled by software. The value of the pull-up depends
on the VDDIO_SD supply voltage. For 1.8V, the resistance range is 30–
82 k Ohms. For 2.6V, it ranges from 21–41 k Ohms. For 3.3V, it ranges
from 15–35 k ohms.
I/O
-23-