User's Manual

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Note d’étude / Technical document : URD1– OTL
5665.3 – 003 / 72238 Edition 01
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SOMMAIRE / CONTENTS
1. OVERVIEW...................................................................................................................................................................7
1.1 OBJECT OF THE DOCUMENT.........................................................................................................................7
1.2 REFERENCE DOCUMENTS.............................................................................................................................7
1.3 MODIFICATION OF THIS DOCUMENT ..........................................................................................................7
1.4 CONVENTIONS...................................................................................................................................................7
2. BLOCK DIAGRAM.......................................................................................................................................................8
3. HILONC FAMILY LEGACY........................................................................................................................................9
3.1 PADS OUT AND NEW FEATURES..................................................................................................................9
3.2 EASY MIGRATION FROM HILONC (V1) TO HILONC V2..........................................................................10
3.2.1 Migration without the use of new features..............................................................................................10
3.2.2 Migration with the use of new features ...................................................................................................10
4. FUNCTIONAL INTEGRATION.................................................................................................................................10
4.1 HOW TO CONNECT TO A SIM CARD ..........................................................................................................11
4.2 HOW TO CONNECT THE AUDIOS? .............................................................................................................13
4.2.1 Connecting microphone and speaker .....................................................................................................13
4.2.2 Recommended characteristics for the microphone and speaker........................................................15
4.2.3 DTMF OVER GSM NETWORK ...............................................................................................................16
4.3 PWM ....................................................................................................................................................................16
4.3.1 PWM outputs ..............................................................................................................................................16
4.3.2 PWM for Buzzer connection.....................................................................................................................16
4.4 NETWORK LED.................................................................................................................................................17
4.5 POWER SUPPLY ..............................................................................................................................................17
4.5.1 Burst conditions..........................................................................................................................................17
4.5.2 Ripples and drops......................................................................................................................................18
4.6 EXAMPLE OF POWER SUPPLIES................................................................................................................18
4.6.1 DC/DC Power supply from a USB or PCMCIA port..............................................................................18
4.6.2 Simple high current low dropout voltage regulator................................................................................19
4.6.3 Simple 4V boost converter. ......................................................................................................................20
4.7 UART ...................................................................................................................................................................20
4.7.1 Signals reminder ........................................................................................................................................20
4.7.2 Complete V24 – connection HiLoNC V2 - host .....................................................................................21
4.7.3 Complete V24 interface with PC..............................................................................................................22
4.7.4 Partial V24 (RX-TX-RTS-CTS) – connection HiLoNC V2 - host.........................................................23
4.7.5 Partial V24 (RX-TX) – connection HiLoNC V2 - host ...........................................................................24
4.8 UART0.................................................................................................................................................................25
4.9 GPIO ....................................................................................................................................................................26
4.10 ADC..................................................................................................................................................................26
4.11 PCM .................................................................................................................................................................26
4.12 RF BURST INDICATOR ...............................................................................................................................26
4.13 BACKUP BATTERY ......................................................................................................................................27
4.13.1 Backup battery function feature ...............................................................................................................27
4.13.2 Current consumption on the backup battery..........................................................................................27
4.13.3 Charge by internal HiLoNC V2 charging function .................................................................................28
4.13.4 Backup Battery technology.......................................................................................................................28
4.14 START THE MODULE PROPERLY AND AVOID POWER UP ISSUES..............................................30
4.14.1 Power domains...........................................................................................................................................30
4.14.2 IO DC PRESENCE BEFORE POWER ON. ..........................................................................................31
4.14.3 SIDE EFFECTS OF A RETRO SUPPLY (CURRENT RE-INJECTION) ...........................................31
4.14.4 EXAMPLE OF A CURRENT RE-INJECTION ON U.A.R.T. ................................................................32
4.14.5 ADVICES FOR EVERY POWER DOMAIN............................................................................................33
4.14.6 CASE OF VBAT RISE TIME ....................................................................................................................34
4.14.7 START- UP.................................................................................................................................................34
4.15 UART SIGNALS AT POWER ON................................................................................................................36
4.16 POWER ON AND SLEEP DIAGRAMS ......................................................................................................37
4.17 MODULE RESET...........................................................................................................................................39
4.18 MODULE SWITCH OFF ...............................................................................................................................39
4.19 SLEEP MODE MANAGEMENT AND POWER CONSUMPTION ..........................................................40