Altec gsm socket al7024s Manuale Utente

AL7020S, AL7024S Designer’s Guide 

 

Doc. No. DG_7024E 

Altec Electronic AG  

Seite 10 / 32 

 
 

 
Label 

 
I/O Type 

 
Signal Name/Description 

VCC PWR 

+5 VDC. A standard 5V +/- 5% - 1.5A power supply is strictly required to 
supply this module (5V Versions). Average current is 270mA  
(350mA @ PCL5). See also chapter 5.1.2 
 
+3.-3 VDC. A standard 3.3V +/- 5% - 1A power supply is strictly required to 
supply this module (3V Versions). Average current is 270mA  
(350mA @ PCL5). See also chapter 5.1.3 

GND GND 

Digital Ground Connect to Digital Ground on the interface circuit. 

~RESET IC 

Modem Reset (ON/OFF). To be pulled to ground by external transistor for 
reset. (on module pull-up resistor of 200K). The GSM Modem has already an 
internal power-up reset circuit. Needs special timing for RESET and ON/OFF 
function (see chapter 3.8) 

AGND GND 

Analog Ground. if a microphone or headset is used, use this as a ground. If 
these are never used, it can be connected to DGND. 

 
 
 
 
 

OPTIONAL SIM CARD READER INTERFACE 

SIMCLK O 

 
SIM Clock. Provided from module. 
 

SIMRST O 

 
SIM Reset. Provided from Module to reset the SIM Card. 
 

SIMDATA I/O 

 
SIM Data line. Digital, bi-directional data line to exchange data between 
module and SIM card. 
 

SIMVCC PWR 

 
SIM Power Supply. 3VDC Power Supply provided from module to power 
the SIM Card. Only 3V SIM Cards are supported.