Motorola W24 用户手册

The VREF regulator is powered from the W24's main power supply, and therefore 
any current sourced through this regulator originates from the W24 VCC supply. 
The overall VCC current consumed by W24 is directly affected by the VREF 
operation. The W24 current consumption rises with respect to the current drawn 
from VREF.

 gives the VREF specifications.

For a detailed description regarding Wake up signal interface, please refer to 

The W24 incorporates an internal antenna detection circuit, which senses the physical connection 
and removal of a Wi-Fi antenna, as well as the cellular antenna, in case that a cellular module like 
G24 is stacked on the W24.

In case of stacked configuration (W24 + G24), a removal of a single or both of the modules 
antennas, will cause the antenna detect indicator to be set Low.

The antenna detection state is reported to the application through the ANT_DET output signal, 
and may also be queried by the AT+iRP19 command.

The detection circuit senses DC resistance to ground on the G24 antenna connector.

A DC resistance below 100kohm (+10%) is defined as a valid antenna connection, and the 
ANT_DET output signal is set high.

This signal is routed from the 70-pin host connector to G24 70-pin connector via W24. It is not 
internally connected to W24 circuits. If the W24 will be used as stand alone only, this signal pin 
should be left open.

V

OUT

I

OUT 

= 150 mA

2.7

2.8

2.9

V

I

OUT

Active mode

-

100

mA

Load regula-
tion

I

OUT 

= 1.0 mA to 

100 mA

2

15

mV

Line regula-
tion

Vin = Vcc
I

OUT 

= 1.0 mA

1

10

mV