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Multi-Tech Systems 92U10E06832 Manuale Utente

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PART 2 – Cellular SocketModems 
Chapter 5 – SocketModem iCell – HSPA 
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342M) 
89 
 
Pin-Out Specifications  
Pin 
Signal Name 
Logic Level 
Voltage* 
I/O 
Description 
J18 
SPI SPCK 
3.3 
O 
SPI clock signal
 
 
J19 
SPI MISO 
3.3 
I 
SPI master-in/slave-out 
J20 SPI 
MOSI 
3.3 
O 
SPI master-out/slave-in 
J21 
SPI CS 
3.3 
O 
SPI chip select 
J24 
–RESET 
3.3 – 5.0 
I 
Device reset (active low) 
J25 
USB VBUS 
3.3 – 5.0 
I 
USB power supply input 
J26 GND 
GND 
GND  Ground 
J27 
USB DP 
3.3 
I/O 
USB data 
J28 
USB DM 
3.3 
I/O 
USB data 
J33 
–RTS 
5.0 
I 
Request to send (active low) 
J34 
–RXD 
5.0 
O 
Received data (active low) 
J35 
–TXD 
5.0 
I 
Transmitted data (active low) 
J36 
–RI 
5.0 
O 
Ring indicator (active low) 
J37 
–DSR 
5.0 
O 
Data set ready (active low) 
J38 
–CTS 
5.0 
O 
Clear to send (active low) 
J39 
–DCD 
5.0 
O 
Data carrier detect (active low) 
J40 
–DTR 
5.0 
I 
Data terminal ready (active low) 
J41 GND 
GND 
GND  Ground 
J48 GPIO0 
3.3 
I/O 
User 
configurable general purpose I/O 
J49 GPIO1 
3.3 
I/O 
User 
configurable general purpose I/O 
J50 GPIO2 
3.3 
I/O 
User 
configurable general purpose I/O 
J51 GPIO3 
3.3 
I/O 
User 
configurable general purpose I/O 
J55 
HEARTBEAT 
3.3 
O 
Heartbeat from processor 
J58 
–LED LINK 
3.3 
O 
Link status (active low, can sink up to 150mA) 
J61 
VCC 
5.0 
PWR 
DC input power 
J63 GND 
GND 
GND  Ground 
*Note:  A hyphen (-) indicates a range of acceptable logic levels. 
 
Serial Model Pin Out 
For Products: MTSMC-H4-IP, MTSMC-H4-GP 
Pins Available With Current PCB: 24, 26, 33-41, 61, 63 
 
 
USB + Serial + GPIO + GPS Data Pin Out 
For Products: MTSMC-H4-MI-IP, MTSMC-H4-MI-GP 
Pins Available With Current PCB: 24-28, 33-41, 48-51, 58, 61, 63 
Pins to Be Added to the Next PCB Revision: 16-17, 22-28, 33-43, 48-51, 58, 61, 63, new GPS data pin 
 
Design Consideration – Very Important Note 
The current revision of the PCB will not accommodate the following pins:  
22-23, 42-43 and the new GPS data pins 16-17.  
  While these pins are not present at this time, they will be present on the 
next hardware release.  
  You, as the developer, must take these new pins into account in your 
product design even if you have no plans for using them.