S i 5 3 5 6 - E V B
2
Rev. 0.2
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 I
2
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
measuring current. I
2
C jumpers allow disconnecting the Si5356 from the I
2
C bus to allow external control from
another I
2
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.
Figure 2. EVB Functional Block Diagram
XTAL
MCU
USB
Connector
XA
XB
SSC_DIS
OEB
CLKIN
I2C_LSB
CLK0
CLK1
VDDOA
VReg
VReg
VReg
VReg
CLK2
CLK3
VDDOB
CLK4
CLK5
VDDOC
CLK6
CLK7
VDDOD
Si5356
VReg
VDD
To
I2C
Bus
SCL
SDA
I2C
Bu
s
To
I2C
Bus
Status
LEDs
Reset
Switch
VDDO
Jumpers
INTR
I2C
Jumpers
VDD
Jumpers
J7
1
2
J7
3
4
J7
5
6
SCL
SDA
VCC
+5V
+5V
+5V
