Data Sheet

25
FORM NO.: FR2-015_ A Responsible Department：WBU Expiry Date: Forever
The information contained herein is the exclusive property of AzureWave and shall not be distributed, reproduced, or disclosed
in whole or in part without prior written permission of AzureWave.
BT_REG_ON
This signal is used by the PMU (with WL_REG_ON) to decide whether or not
to power down the internal AW-CM390SM regulators. If both BT_REG_ON
and WL_REG_ON are low, the regulators will be disabled. When this pin is
low and WL_REG_ON is high, the BT section is in reset. This pin has an
internal 200 kΩ pull-down resistor that is enabled by default. It can be
disabled through programming.
Note: For both the WL_REG_ON and BT_REG_ON pins, there should be at least a 10 msec time
delay between consecutive toggles (where both signals have been driven low). This is to allow time
for the CBUCK regulator to discharge. If this delay is not followed, then there may be a VDDIO in-
rush current on the order of 36 mA during the next PMU cold start.
Control Signal Timing Diagrams
WLAN = ON, Bluetooth = ON