Appendix
CY3677 Evaluation Kit User Guide, Doc. No. 002-12185 Rev. *D
35
B.2. Termination Settings of LVCMOS Clock Output
Figure B-2
illustrates an industry-standard LVCMOS application circuit for quick reference. The LVCMOS output drives
capacitive load only (C
L
), and needs only one series termination resistor (R
S
).
R
S
is chosen based on the signal integrity requirement of the connection between the transmitter and the receiver.
Figure B-2. Recommended LVCMOS Termination Scheme for DC/AC Measurements
50
Ω
Transmitter
Receiver
V
DD
V
DD
R
S
C
L
The desired output measurement can be done using an SMA cable connected to an oscilloscope. SMA offers an extra 50
to the oscilloscope ground, which should be taken into account while doing measurements. This kit does not have any on-
board series termination or AC coupling options. Cypress recommends contacting Cypress Technical Support through
www.cypress.com/support
or e-mail at
, if you want to evaluate any output with series termination or
with AC coupling.
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...