Hardware
CY3677 Evaluation Kit User Guide, Doc. No. 002-12185 Rev. *D
25
4.3 Evaluating Different I/O Standards Using the CY3677 EVK
The CY29430 device has one differential clock output pair (
CLK_P and CLK_N
) and one single-ended clock output (
CLK_SE
).
The onboard components of the CY3677 can be configured to different settings for evaluating different clock standards.
Figure 4-3
and
Table 4-6
illustrate the on-board components related to the CY29430 output clocks.
Figure 4-3. CY3677 Output Termination Settings
Table 4-6: CY29430 Clock Outputs
Clock Output
CY29430 Pin
SMA Connector on CY3677
Resistor to Set Termination (50
)
CLK_P
10
J8
R30
CLK_N
9
J7
R31
CLK_SE
11
J10
NA
The CY29430 device supports LVPECL, LVDS, HCSL, LVPECL2, and CML differential output types. R30 and R31 are the
on-board output termination resistors. The termination settings are controlled by the J5 jumper shunt. The typical laboratory
setup for the evaluation of this kit is shown in
Figure 4-4
. See
Table 4-7
to set correct on-board termination option of
CLK_P
and
CLK_N
.
Table 4-7: J5 Jumper Settings to Terminate Differential Clock Outputs
IO Standard
J5 Jumper Position
Description
LVPECL, HCSL
Short
CLK_P
and
CLK_N
termination voltage set to 0 V through the 50-
Ω termination resistors.
LVDS
Open
100
differential impedance between the
CLK_P
and
CLK_N
.
CAUTION
If you want to configure this kit to any other mode, or any other termination setup, it is
recommended to contact our support through the
www.cypress.com/support
web page, or e-mail
at
.
J5 should not be powered by any external source. Connection of external power source may
damage the EVK.
Three on-board components J5,
R30, and R31 set termination of
CLK_P
and
CLK_N.
Содержание CY3677
Страница 36: ...Appendix CY3677 Evaluation Kit User Guide Doc No 002 12185 Rev D 36 B 3 Schematics Figure B 3 Block Diagram...
Страница 38: ...CY3677 Evaluation Kit User Guide Doc No 002 12185 Rev D Figure B 5 Controller Schematics...
Страница 39: ...CY3677 Evaluation Kit User Guide Doc No 002 12185 Rev D Figure B 6 CY29430 Schematics...