Multi-Tech Systems 92U10E06831 ユーザーズマニュアル

PART 2 – Cellular SocketModems 

Chapter 6 – SocketModem Cell and iCell – EV-DO 

Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342M) 

103 

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 

3.3 – 5.0 

I 

Request to send (active low) 

J34 

~RXD 

(3.3) / 5.0 

O 

Received data (active low) 

J35 

~TXD 

3.3 – 5.0 

I 

Transmitted data (active low) 

J36 

~RI 

(3.3) / 5.0 

O 

Ring indicator (active low) 

J37 

~DSR 

(3.3) / 5.0 

O 

Data set ready (active low) 

J38 

~CTS 

(3.3) / 5.0 

O 

Clear to send (active low) 

J39 

~DCD 

(3.3) / 5.0 

O 

Data carrier detect (active low) 

J40 

~DTR 

3.3 – 5.0 

I 

Data terminal ready (active low) 

J41 

GND GND GND 

Ground 

J44 

PCM OUT 

2.6 

O 

PCM data output 

J45 

PCM IN 

2.6 

I 

PCM data input 

J46 

PCM SYNC 

2.6 

O 

PCM frame synchronization 

J47 

PCM CLK 

2.6 

O 

PCM clock 

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, whereas a slash (/) indicates a build option for one or 

the other. Values in parenthesis are unlikely to be used. 

24, 26, 33-41, 61, 63 

Included models: MTSMC-EV2-IP-N2, MTSMC-EV2-IP-N3, MTSMC-EV2-IP-N16, MTSMC-EV2-GP-
N2, MTSMC-EV2-GP-N3, MTSMC-EV2-GP-N16 

 

With current PCB: 24-28, 33-41, 48-51, 58, 61, 63 
With next PCB rev: 16-17, 22-28, 33-43, 48-51, 58, 61, 63+ New GPS data pin 
Included models: MTSMC-EV2-MI-IP-N2, MTSMC-EV2-MI-IP-N3, MTSMC-EV2-MI-IP-N16, MTSMC-
EV2-MI-GP-N2, MTSMC-EV2-MI-GP-N3, MTSMC-EV2-MI-GP-N16 
Note: The current revision PCB will not accommodate the following pins: 22-23, 42-43 and the new GPS 
data pins 16-17. The Universal Socket Developer Guide shall highlight the fact that while these pins are 
not present upon product launch they will be present on the next HW release. They must make design 
considerations even if they have no plans on using those pins.  

   

24-28, 41, 61, 63 (7-levels for internal use may include additional pins) 
Included models: MTSMC-EV2-U-N2, MTSMC-EV2-U-N3, MTSMC-EV2-U-N16 

Preliminary  

Confidential