SI5356-EVB Datasheet, PDF (2/16 Pages) Silicon Laboratories – Fully powered from a single USB port

Si5356-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
A function block diagram of the EVB is shown in Figure 2. The MCU performs the USB to I²C 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
measuring current. I²C jumpers allow disconnecting the Si5356 from the I²C bus to allow external control from
another I²C 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.
XTAL
J7
65
J7
43
J7
21
SCL
SDA
I2C
Jumpers
To
I2C
Bus
XA
XB
CLKIN
I2C_LSB
SSC_DIS
OEB
SCL
SDA
VReg
+5V
VDD
Jumpers
VDD
Si5356
To
I2C
Bus
VDDOA
CLK0
CLK1
VDDOB
CLK2
CLK3
VDDOC
CLK4
CLK5
VCC
INTR
VDDOD
CLK6
CLK7
VRVRegeg
+5V
VReg
VReg
VDDO
Jumpers
+5V
USB
Connector
MCU
Status
LEDs
Reset
Switch
Figure 2. EVB Functional Block Diagram
2
Rev. 0.2