Answers Database

Xchecker Cable: Can the Xchecker cable be used to program an XC9500 CPLD?


Record #1095

Product Family:  Hardware

Product Line:  Other

Problem Title:
Xchecker Cable:	Can the Xchecker cable be used to program an XC9500
CPLD?



Problem Description:
Keywords: xchecker, 9500, 5v, 3.3v, vccio, adapter, convertor

Urgecny: Standard

General Description:

Can the Xchecker serial cable by used to program an XC9500
CPLD, instead of using the EZTAG cable? Can the xchecker read
TDO values if it is powered by a 3.3V supply?


Solution 1:

The Xchecker cable may be used to program an XC9500 CPLD.

The connections needed to program a 9500 device are the
following JTAG pins: TDI, TMS, TCK, and TDO.

The Xchecker cable has 3 of these 4 pins -- TDI, TMS, and TCK.
There is no connector labeled TDO on the Xchecker cable.  Use
the RD connector instead.

As the Xchecker cable is a serial cable, the programming will
be slower than that of the EZTAG cable, which is a parallel cable.



Solution 2:


 0  Vcc to board Vcc
 0  Gnd to board Ground
 0  TDI to TDI
 0  TMS to TMS
 0  RD to TDO
 0  TCK to TCK




Solution 3:

There are two ways of using the xcheker cable in a 3.3V
environment.

1. Use the xchecker 3.3V adapter, or

2. Use a 5V supply to power the xchecker and a 3.3V system
supply and connect the GROUNDS.



End of Record #1095