Datasheet

Software Control

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2.2.1 LMK04800 Main Tab

After starting the GUI, the LMK04800 Main tab is selected by default and the display looks as shown in

Figure 2.

Figure 2. LMK04800 Main Tab Window

If the GUI connects to the board properly, the USB Status indicator turns green. If the indicator is not

bright green (as shown in Figure 2), check that the board is powered up and the USB cable is installed.

Press the Reset USB button a few times. If this still does not establish the connection, cycle power to the

board and host PC. If this still does not correct the problem, make sure the USB drivers were installed

properly using the Device Manager tool on the PC.

Table 2. Main Window Description

Section Description

Reset USB Issues a software reset to the FTDI USB controller.

Send All Sends all current displayed GUI values to the LMK internal registers.

Save Saves all of the current displayed GUI values to a file.

Load Opens a browser for loading a custom register file into the GUI. The values are not loaded into

the LMK until the Send All button is clicked.

Read All Currently not used.

EXIT Closes the GUI

EEPROM

(1)

Writes and reads the GUI register values to the on-board EEPROM. The writable address range

is from 8 to 15. The readable range is from 0 to 15. Addresses 0-7 are factory programmed and

read only.

LMK04800 Registers Displays the address and data values of the LMK.

(1)

The EEPROM Read only works properly with the Windows 7 OS by opening the GUI using the Run as Administrator option.

TSW4806EVM SLAU454–July 2012

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