Si5356-EVB Si5356 EVALUATION BOARD USERS GUIDE Description EVB Features The Si5356 evaluation board (EVB) is used for Fully powered from a single USB port 2 evaluating the Si5356 IC programmable, any On-board 25 MHz XTAL allows standalone frequency 1200 MHz, quad frequency 8-output clock asynchronous operation generator. GUI programmable V supply allows device to DD operate from 3.3 V, 2.5 V, or 1.8 V (core) GUI programmable V supplies allows each of DDO the four banks of outputs to have its own supply voltage selectable from 3.3 V, 2.5 V, and 1.8 V GUI controlled voltage, current, and power measurements of V and all four V supplies. DD DDO Voltage supply jumpers allows easy access for use of external supplies or current measurements. Figure 1. Si5356 Evaluation Board Rev. 0.2 6/10 Copyright 2010 by Silicon Labs Si5356-EVBSi5356-EVB 1. Quick Start 1. Install the Si5356 ClockBuilder Desktop Software and driver. (Assumes that Microsoft .NET Framework 1.1 is already installed.) 2. Connect a USB cable from the EVB to the PC where the software was installed. 3. Leave the jumpers as installed from the factory and launch the Si5356 configuration software by clicking on Start Programs Silicon Laboratories ClockBuilder Desktop Software. 4. Click on the ClockBuilder Desktop to configure the Si5356 using the graphical user interface. 2. Functional Description 2 A function block diagram of the EVB is shown in Figure 2. The MCU performs the USB to I C conversion, controls the voltage regulators, monitors the INTR pin, and controls the three status LEDs. There are five programmable voltage regulators (VDD, VDDOA, VDDOB, VDDOC, VDDOD), which supply power to the Si5356 device. VDD and VDDO jumpers allow the option of powering the device from external supplies or as a convenient point for 2 2 measuring current. I C jumpers allow disconnecting the Si5356 from the I C bus to allow external control from 2 another I C master. The Si5356 EVB is shipped with an on-board 25 MHz XTAL to allow stand-alone asynchronous operation. The Si5356 can be synchronized to an external reference using the CLKIN input and selecting the external reference using the ClockBuilder Desktop software. To VReg +5V VReg +5V I2C To VReg Bus I2C VReg VReg VDD Bus Jumpers VDDO Jumpers VDD XA VDDOA XTAL XB CLK0 CLK1 CLKIN VDDOB J7 I2C LSB 6 5 CLK2 J7 CLK3 SSC DIS 4 3 Si5356 J7 OEB 2 1 VDDOC SCL CLK4 SCL SDA CLK5 SDA I2C Jumpers VDDOD CLK6 CLK7 INTR VCC +5V Status MCU LEDs USB Connector Reset Switch Figure 2. EVB Functional Block Diagram 2 Rev. 0.2 I2C Bus