Step 4:
Step 5:
Step 6:
Step 7:
Step 8:
Step 9:
Set reference counter (R counter) to the desired value by entering it into the R
Register box in the middle left side (marked by yellow dot at left). Note that
the numbers in the orange boxes are computed values and cannot be directly
typed in.
Verify “frequency step” (which is also called phase detector frequency) is at the
desired value.
Verify that the Prescaler switch is in the default position “Enable” for a normal
operation. Switch it to “Disable” position if the prescaler is to be bypassed
(disabled).
Set the VCO frequency to the appropriate value by typing it into the “Out Freq
(MHz)” box. Once the frequency value is entered into the box, the
corresponded M and A register values are displayed in the “M Register” and “A
Register” Boxes, respectively. Instead of entering the frequency value into the
“Out Freq (MHz)” box, the frequency can also be changed by entering M
register and A register values into the “M Register” and “A Register” boxes
directly.
Click the “SEND DATA” button to send data to the PLL.
The program will automatically read back the R, M and A Register values and
display them in the bottom section. If the EEPROM is programmed
successfully, a message “Device Programmed Successfully!” with a green dot
will display in the bottom section as shown in Fig. 4. Otherwise, if any of the
read back values is different from the programmed value, a message “Device
Programming Failed!” with a red dot will display as shown in Fig. 5. This
feature can be used to read back the R, M and A Register values of a previous
programmed part. To do this, just complete the previous section “Evaluation
Kit Configuration for EEPROM Programming” and Steps 1 and 2 of this section
and then click the “READ DATA” button in the right bottom corner. The “READ
DATA” function will read back and display the R, M and A Register values of a
previous programmed part without showing other message.
Step 10: Once the EEPROM has been programmed, return jumper J8 to the center-to-
right position. This is to ensure that the EEPROM register data is not
corrupted by an inadvertent load.
Step 11: Remove jumper J2 to select EEPROM register.
Step 12: Move Switch 1 of SW1 to the “On” position.
Step 13: Verify on the spectrum analyzer that the part locks to the desired frequency
(J1 and J9 can be disconnected from the cables or remained connected for
this operation).
Step 14: To exit the program, click the “QUIT” button.
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