Texas Instruments CDCE421AEVM - CDCE421A Evalution Module CDCE421AEVM CDCE421AEVM 데이터 시트
제품 코드
CDCE421AEVM
6.2
Manual PLL Block Selection (Advanced Control)
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Chronos GUI Software
This GUI helps users to set the PLL without having to manually alter all the blocks individually within the
PLL. If a user is familiar with the general operation of PLLs, one may activate individual control of the PLL
blocks by clicking on the Advanced Control button. A new window appears, as shown in
PLL. If a user is familiar with the general operation of PLLs, one may activate individual control of the PLL
blocks by clicking on the Advanced Control button. A new window appears, as shown in
Figure 7. CDCE421A Advanced Controls Pop-Up Dialog
summarizes the various menu options available in this dialog window.
Table 1. Advanced Control: Software Setting Options
Section
Function
Selects between VCO1 and VCO2. Only one VCO can be
VCO Select
used during operation. See the CDCE421A product data
sheet for VCO tuning ranges.
sheet for VCO tuning ranges.
The prescalar selection will be determined in conjunction with
Prescalar
the VCO and output divider selection. See the CDCE421A
product data sheet to determine the proper setting.
product data sheet to determine the proper setting.
The output divider will be determined in conjunction with the
Output Divider.
VCO and prescalar settings. See the CDCE421A product
data sheet to determine the proper setting.
data sheet to determine the proper setting.
Driver Select
Selects between LVPECL or LVDS.
This option should be activated with using LVPECL output.
PECL config
When selected, the USB controller will enable onboard
LVPECL termination.
LVPECL termination.
Selects appropriate charge pump current. See screen
Charge Pump Current.
shotsxx for recommended configurations.
Bias 0 should be used at all times. Bias 1 is a reserved test
Loop Filter Bias Select
mode for TI.
SCAU031 – June 2009
10.9-MHz to 1.175-GHz, Low Phase Noise Clock Evaluation Board
9