User's Manual

COMPANY CONFIDENTIAL
Pin No. Pin Name Description Pin No. Pin Name Description
1 VDD_USB Power supply for the
device, 3.3 typically.
2 VDD_USB Power supply for the
device, 3.3 typically.
3 GND Ground 4 GND Ground
5 USB_DP USB differential positive 6 USB_DM USB differential negative
7 WL_REG_ON Enable/disable power the
internal regulators
8 GND Ground
Notice:
WL_REG_ON is used by PMU to enable/disable power the internal regulators, ViH=1.6V, maximum=3.6V.
When WL_REG_ON is low (<1.2(1-20%)=0.96V) or the voltage at VDDIO is less than 0.96V, all six internal
regulators are powered down.
When WL_REG_ON is high (>1.6V) and the voltage at VDDIO is greater than 1. 6V, the CBUCK, LDO2p5V,
CLDO, and LNLDO1 regulators are powered on default.
The voltage at WL_REG_ON should not exceed 3.6V.
There’s a 200Kȍ internal pull-down on WL_REG_ON.
In normal operation mode, WL_REG_ON is pulled-high to 3.3V; and when the device is not needed in the
system, WL_REG_ON should be driven low while VDDIO remains powered, which is called Low-Power
shutdown mode.
5. Antenna Specification
The antennas are PCB printed antenna, its pattern show as below.