Motorola Mobility LLC P56JE1 Manual Do Utilizador

C24 Hardware Interface Manual 

Version 0.3 

 
The module’s interface incorporates a dedicated analog ground contact, AGND pin 61, which is internally 
connected to the module’s ground. The AGND signal is intended to provide a separate ground connection 
for the application’s external audio devices and circuits. 
This signal provides an isolated ground connection directly from the module, which is separated from the 
noisy digital ground of the customer application.  
 
 

 
The module includes 4 Analog to Digital Converter (ADC) signals with 8-bit resolution, for environmental 
and electrical measurements.  
The A/D signals operation and reporting mechanism is defined by the AT+MMAD command.  
The following section describes A/D interface 
 
TABLE 19 – A/D Interface signals 
Pin (s) 

Signal Name 

Description 

- 

VCC 

Power supply A/D 

37 

ADC1 

General Purpose A/D 

43 

ADC2 

General Purpose A/D 

47 

ADC3 

General Purpose A/D / Battery Temperature A/D 

 

 
The main power supply (VCC) is sampled internally by the module through a dedicated A/D port, which is 
not accessible on the interface connector. 
 

TABLE 20 – Supply A/D Specifications 

Parameter 

Conditions 

Min 

Typ 

Max 

Units 

Sampling 

Operating range 

3.0 

 

4.4 

V 

Range 

Resolution 

 

 

 

10 

mV 

 
 

 
The module incorporates a dedicated A/D port for battery thermistor measurements. This feature is 
implemented only in the charger model version. 
 

TABLE 21 – Temperature A/D Specifications 

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Applicant: Motorola, INC

FCC ID: IHDP56JE1