Global Voice ISOmodem-EVB Evaluation Board for the Si2494/39/38/37/36/35/29/19/18/17 ISOModem Description Features The Global Voice ISOmodem EVB evaluation board This evaluation board includes the following: provides the system designer with an easy way of Socketed module with the modem chipset evaluating the ISOmodem . The Voice ISOmodem EVB USB or asynch RS232 Serial Interface consists of a motherboard with a complete removable RJ11 connection to the phone line daughter card Onboard relay-excludable RJ11 connection The Voice ISOmodem is a complete controller based RS232 and USB interface to the PC modem chipset with an integrated and programmable direct access arrangement (DAA) that meets the global Direct access to the ISOmodem signals for telephone line requirements. It is available in a 24-pin or embedded system evaluation 38-pin system side device and a 16-pin line side device. Power from a provided 8.513.5 V dc power The hardware versions at the time of publication are: supply or from the USB port Voice Mother Board Si24xxVMB Rev 2.0 Handset connector (J1) Modem Daughter Card Si24xx2G-DC Rev 2.0 Onboard hookswitch Modem Daughter Card Si24xx2G-QFN38-DC Rev External hookswitch connector 1.0 Jumper matrix that allows any handset wiring The voice daughter card is populated with the correct scheme to work with this board ISOmodem system side chip Onboard speakerphone microphone (Si2494/39/38/37/36/35/29/19/18/17) and the correct line side DAA chip, the Si3018 to suit the voice applica- RCA jack connector to an optional off-board tions. speakerphone electret microphone The ISOmodem eliminates the need for a separate DSP Selectable and adjustable electret power supplies data pump, modem controller, memories, codec, for both handset and speakerphone microphones isolation transformers, relays, opto-isolators and a 3-4 Onboard 300 mW audio power amplifier (into a wire hybrid. The ISOmodem is ideal for embedded 4 load) for driving either onboard or external modem and voice applications due to its small board speaker. area, controller based architecture, low power Onboard voice coil driven loudspeaker for call consumption and global compliance. monitoring An onboard rectifier, filter, and voltage regulator allow LED display of all RS232 signals the power input to be 7.513 V ac or dc (either polarity) supplied through a screw terminal (J8) or a standard 2 mm power jack (J9). Alternatively, power can be supplied through the USB interface (whether the USB or RS232 interface is used). The Power Source Selection in automatic, while the signaling port is selected by a jumper (JP23). The evaluation board audio power amplifier can drive an external speaker for either call progress monitoring or speakerphone function. A small onboard speaker, suitable for call progress monitoring, is installed. Please note that fax modem versions listed in the title require a software driver in order to implement fax send/receive functionality. The driver must be compliant with the Skyworks Solutions ISOmodem and with applicable ITU-T standards (e.g., T.30, T.31, T.4 and T.6) Contact Skyworks Solutions for details. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 0.4 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 14, 2021 Global Voice ISOmodem-EVB Functional Block Diagram As shown in Figure 1, the daughter card is a plug-in component with the complete modem, while the rest of the motherboard provides selectable serial RS232 or USB links, the sound subsystem, and power regulation and distribution. I/O LED ISOmodem Sound Display Daughter Subsystem Card USB/RS232 Call Ext. Interface Pwr Connectors Progress Amp Speaker Logic J11/J10 Audio Si2494/ JP11 Si2438 Series Handset PCM ISOmodem Si3000 RJ10 EXT. Regulation Power Microphone & Connectors J2 Switching Skyworks LED Status Display On Board Exclusion Hook Switch Relay Loudspeaker RJ 11 RJ 11 Telephone Telephone Connector Connector Figure 1. Functional Block Diagram The voice ISOmodem EVB provides a sound system consisting of the Si3000 codec along with a handset RJ10 connector as well as onboard microphone and loudspeaker with options for these devices to be placed off-board. The bias voltages for both the onboard microphone and the handset microphone can modified and alternate sources used. This allows the board to be used as a telephone or as a speakerphone as is, or to be integrated into the customer s system. The evaluation board can drive an external speaker or a small onboard speaker. For speaker-phone applications it is recommended that an off board loudspeaker be used. An onboard rectifier, filter and voltage regulator allow the power input to be 8.5 to 13.5 V peak ac or dc of either polarity supplied through screw terminals (J8) or a standard 2 mm power jack (J9). Alternatively the power can be supplied through the USB interface. Automatic switching is provided for the power, but not for the data interface. That data interface is selected by JP23. 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 0.4 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 14, 2021