Janus 910CF User Manual

910CF Plug-In Modules

Evaluation Kit User Guide

Bulletin

Revision

Date

JA03-EKUM_910

A00

31 July 2013

Introduction

The following document describes the functions of the evaluation board for the 910CF Plug-In series of cellular communication terminals. This guide, along with the Plug-In Modules Hardware User guide, allows all features of the terminal to be evaluated before your PCB goes into CAD.

Evaluation Kit Board Details

AT Command

Port

Automatic

ON

Cellular

ON/OFF

Cellular

Reset Status

LEDs

Telit Trace

Port

COM

Selection

Headers

3.1mm

Audio Jacks

Power

Selection

MCX Bracket

USB Port

Plug-In Module

Connector

UART Translation

Interface

UART VCC Select

VBUS Enable

SMA Bracket

Power IN

(2.1mm barrel connector)

Terminus 910CF Modules Evaluation Kit User Guide Page 2 Rev: A00 Date: 07/31/13

Interfaces

Power Supply

The Evaluation Board requires 5VDC to power the evaluation PCB and module. The evaluation board has two power supply connection options: center positive barrel connector or terminal block direct wire connection.

The Evaluation Board is equipped with protection circuitry to prevent reverse voltage, as well as help with protection from transients. The board can withstand a reverse voltage of -40V and a peak voltage of 60V. The circuitry is set to clip any input greater than 5.6V to a safe level.

Any input above 5.6V will read for a set period, and if before 2.0 uS has not returned to safe level, the over-voltage protection will activate and turn off the output.

To re-enable the output, power must be cycled or the SWITCHER_EN pin (DIP pos. 7) must be pulled low at least 3.0 μS and then released. Alternatively, if the power returns to a safe level for 36.0 mS the output will re-enable.

Power supply requirement:

Voltage: 5Vdc ± 5% Power: 10W peak

Serial Interfaces

RS-232 Serial Ports

The Evaluation board for the Plug-In terminals has two RS-232 serial ports.

AT COMMAND PORT:

This port is available to send AT commands to the terminal. Please refer to the CF Plug-In User Guide for serial port details for the speciﬁc terminal you are evaluating.

Typical Port Settings:

Baud: 115200 Data bits: 8 Parity: None Stop Bits: 1 Hardware Handshaking: CTS/RTS

Trace Port:

This port is used by the HSPA910CF terminal as a secondary serial AT interface. This port is not used for Python script upload. However, during development of Python scripts this port can be used to receive debug ‘print’ statements. In order to do this, AT#PORTCFG=3 should be used. Hardware handshaking is not available on this port.

Port Settings:

Baud: 115200

Data bits: 8

Parity: None

Stop Bits: 1

Hardware Handshaking: N/A

Terminus 910CF Modules Evaluation Kit User Guide Page 3 Rev: A00 Date: 07/31/13

Interfaces continued

Serial Interfaces continued…

UART Translator Interface:

If the user wants to communicate with the modem’s serial interface via the on board UART translation, you can attach to the SIP header interface, P18. The full UART is broken out, along with TRACE TX and TRACE RX.

The translator’s modem side level is referenced to VAUX, meaning it is OFF when the modem is off. This function will tri-state the signals as recommended in the Plug in Modem User Manual.

The user can select between their own input voltage level and 3.3VDC by adjusting the J8 jumper setting.

1-2: 3.3V

2-3: User VCC In

If User VCC In is used, the header position #1, labeled UART VCC IN, should be connected to the desired power supply.

Absolute Maximum Ratings

Parameters Min Max

Supply Voltage -0.5v 6.5v Input Voltage -0.5v VCC + 0.5v Continuous Output Current - +/- 50mA

Recommended Operating Characteristics

Parameter Supply Min Max

Supply Voltage 1.65v 5.5v VIH 1.65v to 1.95v VCC*0.65 -

2.3v to 2.7v 1.7v -

3.0v to 3.6v 2.0v -

4.5v to 5.5v VCC*0.7 VIL 1.65v to 1.95v - VCC*0.35

2.3v to 2.7v - 0.7v

3.0v to 3.6v - 0.8v”

4.5v to 5.5v - VCC*0.3 VOH 1.65v to 1.95v 1.2v -

2.3v to 2.7v 1.9v -

3.0v to 3.6v 2.4v -

4.5v to 5.5v 3.8v VOL 1.65v to 1.95v - 0.45v

2.3v to 2.7v - 0.3v

3.0v to 3.6v - 0.55v

4.5v to 5.5v - 0.55v

Terminus 910CF Modules Evaluation Kit User Guide Page 4 Rev: A00 Date: 07/31/13

Interfaces continued

Serial Interfaces continued…

USB Serial Ports:

The development board allows access to virtual COM ports and modem ports via the USB. To use this interface during development you will need to download the USB drivers from the Janus website (www. janus-rc.com).

The HSPA910CF will show several virtual COM ports after the drivers are installed. These are USB0 through USB6, along with a modem for applications like Dial Up with Windows. This allows for applications like simultaneous AT commands, voice calls, and Python tracing.

These ports can be conﬁgured in various ways depending on the user’s application, but by default USB0 and USB3 are AT command ready after enumeration.

Typical Port Settings:

Baud: 115200 Data bits: 8 Parity: None Stop Bits: 1 Hardware Handshaking: N/A

You will want to reference the HSPA910CF Ports Arrangements application note for full details on using the AT#PORTCFG command.

Please note that in order for proper power on sequencing, the modem must be turned on ﬁrst. The USB VCC line must be disconnected until the device is on otherwise it may not power up correctly, or properly install the USB drivers. The development board already handles this power sequencing for you in both automatic turn on and manual turn on modes, but it is good to note for your implementation outside of the development kit.

Audio

The development board is equipped to take advantage of the DVI signals present on the HSPA910CF and EVDO910CF. The connection available to the user is in separate 3.5mm EAR and MIC ports. The audio uses the MAX9867 IC and is set for capacitorless differential mode. Control of the MAX IC is done via the I2C available on the modems (using GPIO 9 and GPIO 10) with the AT#I2CWR command.

Terminus 910CF Modules Evaluation Kit User Guide Page 5 Rev: A00 Date: 07/31/13

Janus 910CF User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual