Si2401FS10-EVB EVALUATION BOARD FOR THE Si2401 WITH A UART INTERFACE Description A direct access header (JP3) is available on the motherboard to bypass the RS-232 transceivers and The Si2401FS10-EVB evaluation board provides the connect the Si2401 ISOmodem directly to a target system designer an easy way of evaluating the Si2401 system. ISOmodem . The Si2401FS10-EVB consists of a Power is supplied through a screw terminal (J3) or a motherboard with a power supply, an RS-232 and USB standard 2 mm power jack (J4). An onboard rectifier, interface, other ease-of-use features, and a complete filter, and voltage regulator allow the power input to be removable modem module on a daughter card. (A 7.513 V ac or dc (either polarity). Alternatively, power functional block diagram of the Si2401FS10-EVB is can be supplied through the USB interface (whether the shown below.) The Si2401 ISOmodem is a complete USB or an RS232 interface is used). The Si2401FS10- controller-based modem chipset integrating Skyworks EVB can drive an external speaker for call monitoring, Solutions third-generation, globally-programmable or a piezoelectric speaker can be mounted directly on direct access arrangement (DAA). Available as two 16- the board in the space provided. pin small outline (SOIC) packages, the Si2401 ISOmodem eliminates the need for a separate DSP Features data pump, modem controller, memories, codec, isolation transformer, relays, opto-isolators, and a 2- to The Si2401FS10-EVB includes the following: 4-wire hybrid. The Si2401 is ideal for embedded modem Dual RJ-11 connection to phone line applications due to its small board area, controller- RS-232 and USB interface to PC based architecture, low power consumption, and global compliance. The Si2401FS10-EVB provides an RJ-11 Audio connector for call monitoring jack for interfacing to the phone line and a DB9 or USB Direct access to Si2401 for embedded application connector for interfacing the Si2401FS10-EVB to a PC evaluation or data terminal serial port. This allows the Si2401 Easy power connection to common 7.513.5 V ISOmodem to operate as a serial modem for power supplies or USB port straightforward evaluation. To evaluate the Si2401 9 V ac adaptor ISOmodem in an embedded system, the daughter card Simple installation and operation can be used independently or with the motherboard. Functional Block Diagram Audio 9 V dc at 300 mA ac Out Adaptor Audio Amplifier Voltage Direct Rectifier 3.3 V Regulator Access HDR Filter 7.513.5 V dc or Daughter Board Boundary peak ac 5 V USB USB I/F AOUT Phone Connector Interface Line Interface Selection Si2401 Si3010 RJ-11 Circuit UART Jumpers RS-232 DB9 Transceivers RESET XTALO XTALI Push Button Reset Power-On Reset Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.1 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 29, 2021Si2401FS10-EVB 1. Introduction 2. Si2401FS10-EVB Setup and Evaluation Notable differences between the Si2401 and other This section explains how to set up the Si2401FS10- ISOmodem products are highlighted in the bulleted list EVB for evaluation as an RS-232 or USB interface below. For complete details and specifications, refer to modem. Jumper settings, power connection, the current Si2401 data sheet. PC/terminal connections, and terminal program Unique Si2401 Features: configuration settings are given. After power is applied, Many AT commands execute when entered the initial modem setup and a basic tutorial on modem without <CR>. operation are provided. The Si2401FS10-EVB S-Register address and value are entered in hex configurations for evaluating additional features are (example: ATS0F = 2B). discussed separately. Result codes are abbreviated (example: O 2.1. Si2401FS10-EVB Quick StartRS-232 instead of OK). Interface The Si2401DC power must be 3.3 V. 1. Set jumpers according to Figure 1. Several AT commands are required to enable the speaker: 2. Connect: ATSE2 = 80 configures GPIO4 for AOUT. DB-9 to PC COM 1 (with a pass-through cable). ATSF4 = 00 removes Tx and Rx audio mute. RJ-11 to phone line or test box. ATM2 turns on speaker continuously. the 9 V ac adaptor (or USB cable). DTE interface default is 8N1, 2400 bps, hardware 3. Bring up: flow control, and no linefeeds with carriage Turn on power to modem. returns. Set Terminal Program for 2400 bps 8N1. ATDT is disabled if linefeeds with carriage returns Hardware flow control. Disable linefeeds with are enabled. carriage returns (linefeeds with carriage returns Some common AT Commands are not available: disable ATDT commands.) A/ 4. Type AT followed by a carriage return. ATD (must be ATDT or ATDP) Should echo AT and then an O. AT&Tn (use ATSE4=20 for local digital loopback) 5. Type: ATS00 = 01 for auto-answer on first ring. Table 1. Modem Configuration Examples Modulation ATS07 = 2.2. Si2401 FS10-EVB Quick StartUSB V22bis 06 Interface V.22 02 1. Set jumpers according to Figure 2. V.21 03 2. Connect: Bell 212A 00 USB cable to PC. Bell 103 01 RJ-11 to phone line or test box. V.23 (1200 TX, 75 RXAnswer) 14 3. Download USB driver for your operating system V.23 (75 TX, 1200 RXOriginate) 24 from the CD supplied with the evaluation board. V.23 (600 TX, 75 RXAnswer) 10 4. Install driver. V.23 (75 TX, 600 RXOriginate) 20 5. Bring up: Reset the modem. Table 2. Modem Initialization Example Set Terminal Program for 2400 bps 8N1. Hardware flow control. Disable linefeeds with Command Function carriage returns (linefeeds with carriage returns ATS00 = 02 Auto-answer after two rings disable ATDT commands). ATS07 = 06 Configures modem for V.22b 6. Type AT followed by a carriage return. ATSF4 = 00 Removes audio mute Should echo AT and then an O. ATM1 Turns on speaker until carrier negotiated 7. Type: ATS00=01 for auto-answer on first ring. 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.1 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 29, 2021