9FGV1001, 9FGV1002, and 9FGV1004
PhiClock™ PCIe Evaluation Board
Introduction
The evaluation board is designed to help the customer evaluate the 9FGV1001, 9FGV1002, and 9FGV1004 devices. When the board is
connected to a PC running IDT Timing Commander
different combinations of frequencies.
Board Overview
Use Figure 1 and Table 1 to identify: power supply jacks, USB connector, input and output frequency SMA connectors.
Figure 1. Evaluation Board Overview
™ software through USB, the device can be configured and programmed to generate
9FGV1001, 9FGV1002, and 9FGV1004 PhiClock™ PCIe Evaluation Board User Guide
Table 1. Evaluation Board Pins and Functions
Label NumberNameOn-board Connector LabelFunction
2
1I
C Interface ConnectorJ2
Alternative I
IDT Timing Commander can also use Aardvark.
2
C interface connector for Aardvark.
Connect this USB to your PC to run IDT Timing
2USB ConnectorJ6
Commander.
The board can be powered from the USB port.
3Output Power Supply JackJ3
4Core Power Supply JackJ4
Connect to 1.8V, 2.5V or 3.3V for the output voltage of
the device.
Connect to 1.8V, 2.5V or 3.3V for the core voltage of the
device.
5Ground JackJ5Connect to ground of power supply.
6Differential Output 1S7 and S10
7Differential Output 2S6 and S9
8Differential Output 3S5 and S8
Can be a differential pair, or two single-ended outputs.
Available logic types: LVCMOS, LVDS and LP-HCSL.
Can be a differential pair, or two single-ended outputs.
Available logic types: LVCMOS, LVDS and LP-HCSL.
Can be a differential pair, or two single-ended outputs.
Available logic types: LVCMOS, LVDS and LP-HCSL.
9Reference Output 0S1Reference or buffered output from the crystal.
VDD_REFP1, VDDO_0, VDDO_1, four-way headers
10
Power Supply Voltage
Selector
E1, E2, E3, E4, E5, E6
used to select a power supply voltage. Connect the
center pin to one of the 4 surrounding pins to select a
voltage or a source.
11Reference Output 1S2Reference or buffered output from the crystal.
12Differential Output 0S3 and S4
Can be a differential pair, or two single-ended outputs.
Available logic types: LVCMOS, LVDS and LP-HCSL.
13DIP SwitchU2
Board Power Supply
The evaluation board uses jumpers E1–E6 to set the power supply voltages for various VDD pins. The 4-way jumpers can select 3
different voltages from regulators that use power from the USB port. Selection #2 is the jack for connecting a bench power supply.
E1: Power supply for the REF outputs. The E1 voltage also determines the LVCMOS output levels of the REF0 and REF1 outputs.
E2: Power supply for the OUT0 output driver.
E3: Power supply for the OUT1 output driver.
E4: Power supply for the analog (V
E5: Power supply for the OUT2 output driver.
E6: Power supply for the OUT3 output driver.
See 9FGV100x Evaluation Board Schematics (Figure 5–Figure 8) for detailed information.
DDA
) and digital (V
Used to control certain pins like OEA, OEB, SEL0, SEL1
9FGV1001, 9FGV1002, and 9FGV1004 PhiClock™ PCIe Evaluation Board User Guide
DIP Switch (U2)
Refer to Figure 2 and Table 2 for the DIP switch settings and functions.
Figure 2. DIP Switch (U2)
Table 2. DIP Switch Settings
Switch NumberFunction
1 = OEA
See datasheet.
2 = OEB
3 = SEL0
Select 1 of 4 pre-programmed configurations when in Hardware Select mode. Also see switch 8.
4 = SEL1
5Not used.
6Not used.
7Not used.
Selects operating mode at power-up.
2
8 = Mode
“-” or “O” selects I
C mode.
“+” selects Hardware Select mode.
Interfacing with a Computer to Run Timing Commander
As shown in Figure 3, jumpers JP1 and JP2 are installed to use the FTDI chip U6 for connecting to the computer with the USB port J6.
The U6 chip translates USB to I
When using Aardvark, remove jumpers JP1 and JP2 and connect the Aardvark to connector J2. Default I
9FGV100x is 0x68.
2
C.
2
C device address for the
Miscellaneous interfaces can connect to J2 pin 1 for the Serial Clock and to J2 pin 3 for the Serial Data signal. J2 pin 2 can be used as
ground, but any other ground pin will also work.
When OTP in the 9FGV100x devices is burned with multiple configurations, JP1 and JP2 can be applied in JP3 position respectively to
connect the SEL0 and SEL1 switches in U2. Move switch 8 to “+” and power-up the 9FGV100x in Hardware Select mode. This enables
changing between 4 configurations with SEL0/1.
9FGV1001, 9FGV1002, and 9FGV1004 PhiClock™ PCIe Evaluation Board User Guide
Figure 3. Connecting to a Computer via USB Port J6
On-board Crystal
A 25MHz crystal is installed on the board and is used as the reference frequency. The board can also be modified to insert an external
reference clock into the XIN pin using SMA connector S11. When using an external reference clock, additional components need to be
assembled and the crystal needs to be removed.
Output Terminations
Each differential output has a pair of SMA connectors to connect to a 50Ω coax. It is recommended to combine the two signals using a
balun or splitter/combiner device when measuring jitter or phase noise. The circuit at the SMA connectors is shown in Figure 4.
9FGV1001, 9FGV1002, and 9FGV1004 PhiClock™ PCIe Evaluation Board User Guide
The circuit is designed for maximum flexibility when testing all possible logic types. Default assembly uses a 0.1μF capacitor in place of
R14 and R16, and the short across R14 and R16 is cut. No other devices are assembled. This simple AC-coupled configuration allows for
testing phase noise and jitter of all possible logic types. The circuit can be modified for custom tests. TP3 is a position to place a
differential FET probe.
Operating Instructions
1. Set all jumpers for power supply choices (E1–E6), interface choices (JP1 and JP2), and set the U2 switches.
2. Connect an interface: USB or I
2
C.
3. In the case of an I2C interface, also connect external power supply to jacks J3, J4 and J5.
4. Start Timing Commander for either USB or Aardvark.
a. Start new configuration or load TCS file for existing configuration.
b. Choose PhiClock personality.
c. For Aardvark, click to select Aardvark “Connection Interface”.
d. For a new configuration, prepare all settings.
e. Click to connect to the 9FGV100x device. Top right should turn green.
f. Click to write all settings to the 9FGV100x device.
g. It should now be possible to measure clocks on outputs.
h. While connected, each change to the settings will be written to the 9FGV100x immediately and can be observed at the clock outputs.
9FGV1001, 9FGV1002, and 9FGV1004 PhiClock™ PCIe Evaluation Board User Guide
Ordering Information
Orderable Part NumberDescription
EVK9FGV1001
Evaluation board with all differential outputs AC coupled.EVK9FGV1002
EVK9FGV1004
Revision History
Revision DateDescription of Change
March 1, 2018Initial release.
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