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Using the EVM Control Software

Figure 2. Initial GUI Screen

6 Using the EVM Control Software

The graphical layout of the programming software is based on the functional structure of the CDCM6208.

The following settings are changed with this tool:

• Input frequency

• Input divider

• Input type

• Input selection to the PLL

• Charge-pump current

• Internal loop filter components (3

Pole)

• Pre-scalar and feedback divider

• Output MUX selection

• Output divider or frequency

• Output type

This software also sets input and output buffer supply voltage bits (1.8 V or 2.5/3.3 V)..

6.1 Primary and Secondary Reference Signal Type Selection

Using the pull-down menu, input clock type is selected or input buffer is disabled. The input signal type for

Primary clock and Secondary clock are set to either LVDS, CML, or LVCMOS. Additionally, crystal input is

selectable for Secondary input.

6.2 Input Divider For Primary Reference ®) Selection

The primary reference has a 4-bit divider ®), therefore, up to 16 appropriate divider values are available.

SCAU049A–May 2012–Revised January 2013 CDCM6208 Evaluation Board

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