Download RJModem MT5656RJ Developer`s Guide - Multi

Contents
Chapter 1 – RJModem Hardware ....................................................................................................................5
RJModem Features ....................................................................................................................................................... 5
Product Ordering Information ...................................................................................................................................... 5
Ordering Codes .............................................................................................................................................................. 6
Developer Kit ................................................................................................................................................................ 6
AT Commands............................................................................................................................................................... 6
Technical Specifications ................................................................................................................................................ 7
Dimensions for Board Mounting and Panel Mounting .................................................................................................. 8
Board Mounting Dimensions ......................................................................................................................................... 8
Panel Mounting ............................................................................................................................................................. 9
Attaching the Mounting Bracket ................................................................................................................................... 9
Dimensional Drawing of the Bracket........................................................................................................................... 10
Cable Specifications .................................................................................................................................................... 10
PCB Footprint ............................................................................................................................................................. 11
Pin Out Dimensions .................................................................................................................................................... 12
PCB Footprint or Board Lay-out (Note: This is the PCB top view) ............................................................................... 12
Pin Descriptions .......................................................................................................................................................... 12
Top View ...................................................................................................................................................................... 12
Transmit Clock (TXCLK) and Receive Clock (RXCLK) ..................................................................................................... 14
Using &Q Command to Control the Connection Modes ............................................................................................. 14
Using &W Command to Save Configuration................................................................................................................ 15
Electrical Characteristics ............................................................................................................................................. 16
3.3 V Serial RJModem .................................................................................................................................................. 16
5 V Serial RJModem ..................................................................................................................................................... 16
Handling Precautions................................................................................................................................................... 16
Developer Board ......................................................................................................................................................... 17
5 V / 3.3 V Jumper – JP6 .............................................................................................................................................. 18
Block Diagram ............................................................................................................................................................. 19
Developer Board Schematics ...................................................................................................................................... 20
Design Considerations ................................................................................................................................................ 23
PC Board Layout Guidelines ........................................................................................................................................ 23
Electromagnetic Interference (EMI) Considerations ................................................................................................... 23
EMI Filtering ................................................................................................................................................................ 24
Chapter 2 – Safety and Regulatory Information............................................................................................. 25
Analog Telecom Safety Warnings ................................................................................................................................ 25
Telecom Approvals ..................................................................................................................................................... 26
EMC, Safety, and R&TTE Directive Compliance ........................................................................................................... 26
Industry Canada........................................................................................................................................................... 26
Brazil Approval............................................................................................................................................................. 27
Telecom Requirements for the United States ............................................................................................................. 27
47 CFR – FCC Part 15 ................................................................................................................................................... 27
47 CFR Part 68 Telecom ............................................................................................................................................... 27
New Zealand Telecom Warning Notice ....................................................................................................................... 29
Multi-Tech Systems, Inc. RJModem Developer's Guide
3