Motorola Mobility LLC T56HQ1 Manuale Utente

The G24 includes 5 Analog to Digital Converter (ADC) signals with 10-bit resolution, for 
environmental and electrical measurements. The ADC signals measure an analog DC voltage 
level on their inputs which is converted to a 10-bit digital value for further processing by G24 or 
the user application.

The A/D signals operation and reporting mechanism is defined by the AT+MMAD command. 
Each A/D can be defined to provide several reports:

A single measurement.
A single A/D measurement will take place and will be reported upon activation of the AT 
command.

An automatic periodical measurement.
The A/D measures its input signal at a rate that is defined by the user application. Every 
measurement will generate an unsolicited message over the serial interface.

An automatic periodical measurement with predefined limits.
The A/D measures its input signal at a rate that is defined by the user. The user also defines 
upper and/or lower limits for the A/D measurements. Each measurement is compared to 
these limits, and an unsolicited message is generated only if these limits are exceeded.

In case the defined periodical measurement rate is equal to, or shorter than, the 
defined sleep mode delay settings (ATS24), G24 will not enter low power mode.

 below, lists the internal and external A/D signals provided by G24.

The main power supply (VCC) is constantly monitored internally by the G24 through a dedicated 
A/D signal, which is not accessible on the interface connector.

The measured VCC level can be read and monitored by the user application through the 
AT+MMAD command, which returns the measured VCC level in Volts times 100.

For example, a measured supply level of 3.65 Volts will be presented as 365 by the MMAD 
command.

VCC

Power Supply ADC

-

5

3.0

4.5

V

Temp

Temperature ADC

-

4

-30
(229)

70
(17)

°

C

(ADC)

ADC3

GPAD 3

47

3

0

2.3

V

ADC2

GPAD 2

43

2

0

2.3

V

ADC1

GPAD 1

37

1

0

2.3

V