electronics forum

Rules | Recent posts | topic RSS | Search | Register  | Log in

JTAG Chain Cable Length
Post new topic  Reply to topic    EDAboard.com Forum Index -> Embedded Systems and Real-Time OS -> JTAG Chain Cable Length
Author Message
environ



Joined: 05 Aug 2005
Posts: 1
Post05 Aug 2005 17:38   

JTAG Chain Cable Length
Hi,

for a new design I want to use a JTAG chain between multiple FPGAs.
The problem is, the FPGA are spread over an large area, so I will get problems with the cable length (>= 30 cm).

Can I put some LVDS tranceivers between the devices?
For example the ST Thomson STLVDS32 and STLVDS31 ?
Each of them will delay the singal for 2.5 ns

Has anyone tried this before?

Thank you for your answers
Back to top
Google
AdSense
Google Adsense
Post05 Aug 2005 17:38   

Ads


Back to top
jdhar



Joined: 16 Aug 2004
Posts: 261
Helped: 13
Post05 Aug 2005 20:40   

JTAG Chain Cable Length
LVDS transceivers are for 1.25V, or around there. Are you sure your JTAG's signals use those levels? There should be no problem with inserting buffers between the FPGA's however.
Back to top
Arabic versionBulgarian versionCatalan versionCzech versionDanish versionGerman versionGreek versionEnglish versionSpanish versionFinnish versionFrench versionHindi versionCroatian versionIndonesian versionItalian versionHebrew versionJapanese versionKorean versionLithuanian versionLatvian versionDutch versionNorwegian versionPolish versionPortuguese versionRomanian versionRussian versionSlovak versionSlovenian versionSerbian versionSwedish versionTagalog versionUkrainian versionVietnamese versionChinese version
Post new topic  Reply to topic    EDAboard.com Forum Index -> Embedded Systems and Real-Time OS -> JTAG Chain Cable Length
Page 1 of 1 All times are GMT + 1 Hour
Similar topics:
How to reduce the Scan Chain Length in Astro? (1)
initialize jtag chain error. (2)
fpga missing in jtag chain (1)
Altera and xilinx on the same jtag chain (5)
My CPLD stopped working! Can't access JTAG chain (2)
How to bypass 2nd device in JTAG chain without iMPACT? (2)
impact config Spartan-II init chain error,cable III, (4)
JTAG routing length (3)
Thermocouple Cable Length (11)
LCD cable length (8)


Abuse || Administrator || Moderators || Support us || sitemap
topic RSS