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?
ソリューション
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.
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
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.