Motorola Mobility LLC T56KT1 User Manual

The VREF regulator is powered from the G30's main power supply, and therefore 
any current sourced through this regulator originates from the G30 VCC supply. 
The overall VCC current consumed by G30 is directly affected by the VREF 
operation. The G30 current consumption rises with respect to the current sourced 
through VREF.

 gives the VREF specifications.

The G30 incorporates a real time block and is operated by the VRTC power located on pin 62 of 
the 81-pin LGA interface, or pin 60 of the 70-pin connector interface. For detailed explanation, 
refer to 

A 47uF capacitor should be connected between ground and VRTC signal (pin 62 of the 
81-pin LGA interface/pin 60 of the 70-pin connector).

Some applications incorporate their own power saving mode, in which they operate with minimal 
functionality, including disabling of interfaces and serial communications.

The wakeup-out (WKUPO) signal is an active low output, which is designed to support a low 
power mode feature in the host application. This signal is used by G30 to indicate that it requires 
to communicate with the host application through the serial interface, due to an incoming call or 
data, or an unsolicited event. Applications that incorporate a low power mode should use this 
signal as an indication to switch from low power mode to normal operation, and activate the serial 
interface.

The wakeup-out mechanism, using the WKUPO signal, is controlled by 2 AT commands (see 

ATS102 - Defines the delay time in milliseconds that G30 will wait, after asserting the 
WKUPO signal low, before sending data on the serial interface. This delay is required to 
allow the application enough time to reactivate from low power mode and switch to normal 
mode.
If ATS102=0, which is the default value, the WKUPO signal and mechanism is disabled.

V

OUT

I

OUT 

= 30 mA

-3%

2.8

+3%

V

I

OUT

30

mA

Load regula-
tion

7

mV

Line regula-
tion

10

mV

PSRR

50 Hz - 20 kHz

35

dB