Functional description. Wavecom FASTRACK M1306B

WM_PRJ_M12_UGD_001 - 002

18th September 2003

2 Functional description

2.1 Architecture

M1206 FASTRACK MODEM

RS232

Interface

VCC

VCC

BOOT

RESET

Microphone

Speaker

Audio

Interface

Microphone

Speaker

WISMO Quik

Q2406B

SMA

Operating

Status

SUB HD

15 pins

VCC

3V / 5V SIM

Power Supply

V+BATT

GROUND

Micro-FIT

4 pins

DC / DC

Power

Supply

VCC

SIM card

Socket

SIM card

Holder

Figure 6: Functional architecture

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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.

Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable.

WM_PRJ_M12_UGD_001 - 002

18th September 2003

2.2 RS232 serial link

2.2.1 General presentation

The RS232 interface performs the voltage level adaptation (V24/CMOS

⇔

V24/V28) between the internal WISMO module (DCE) and the external world

(DTE).

The RS232 interface is protected (by ESD protection) against electrostatic surges on the RS232 lines.

Filtering guarantees:

EMI/RFI protection in input and output,

Signal smoothing.

A flexible 6-wire serial interface is available complying with RS232 protocol signaling.

The signals available are:

•

TX data (CT103/TX),

•

RX data (CT104/RX),

•

Request To Send (CT105/RTS),

•

Clear To Send (CT106/CTS),

•

Data Terminal Ready (CT108-2/DTR),

•

Data Set Ready (CT107/DSR).

The 2 additional signals are Data Carrier Detect (CT109/DCD) and Ring

Indicator (CT125/RI).

FASTRACK

MODEM

M1206

(DCE)

CT103 / TX

CT104 / RX

CT105 / RTS

CT106 / CTS

CT107 / DSR

CT108-2 / DTR

CT109 / DCD

CT125 / RI

DTE

Figure 7: RS232 Serial Link signals

RS232 interface has been designed to allow a certain flexibility in the use of the serial interface signals. However, the use of TX, RX, CTS and RTS signals is mandatory which is not the case for DTR, DSR, DCD and RI signals which can be not used. confidential ©

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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.

Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable.

CT103/TX

CT104/RX

CT105/RTS

CT106/CTS

CT107/DSR

CT108-2/DTR

CT109/DCD

WM_PRJ_M12_UGD_001 - 002

18th September 2003

2.2.2 Pin out description

Pin description

HD connector

Pin number type

RS232

STANDARD

2

6

12

11

7

8

1

I

O

I

O

O

I

O

TX

RX

RTS

CTS

DSR

DTR

DCD

Description

Transmit serial data

Receive serial data

Request To Send

Clear To Send

Data Set Ready

Data Terminal Ready

Data Carrier Detect

2.3 RESET

2.3.1 General presentation

This signal is used to force a reset procedure by providing low level during at least 500 µs.

This signal has to be considered as an emergency reset only. A reset procedure is automatically driven by an internal hardware during the power-up sequence.

This signal can also be used to provide a reset to an external device. It then behaves as an output. If no external reset is necessary this input can be left open, if used (emergency reset), it has to be driven by an open collector or an open drain output:

•

RESET pin 14 = 0, for Modem Reset,

•

RESET pin 14 = 1, for normal mode.

Pin description

Signal Sub HD 15-Pin connector

Pin number

Description confidential ©

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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.

Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable.

WM_PRJ_M12_UGD_001 - 002

18th September 2003

Additional comments on RESET:

The RESET process is activated either by the external RESET signal or by an internal signal (coming from a RESET generator). This automatic reset is activated at Power-up.

The modem remains in RESET mode as long as the RESET signal is held low.

This signal should be used only for “emergency” resets .

A software reset is always preferred to a hardware reset.

2.3.2 Reset sequence

To activate the « emergency » reset sequence, the RESET signal has to be set to low for 500

µ s minimum.

As soon as the reset is complete, the AT interface answers « OK » to the application. For this, the application has to send

AT

↵

.

If the application manages hardware flow control, the AT command can be sent during the initialisation phase. Another solution is to use the AT+WIND command to get an unsolicited status from the modem.

For further details, refer to AT commands documentation [1].

EXTERNAL RESET

Min:500

µ s

Typ: 2 ms

AT answers “OK”

Modem READY

STATE OF THE MODEM

RESET mode

I

BB+RF

=20 to 40 mA

Modem ON

I

BB+RF

<120 mA without loc update

Modem READY

SIM and network dependent

Figure 8: Reset sequence diagram

2.4 BOOT

The use of this function is reserved to WAVECOM SA. confidential ©

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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.

Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable.