Cyclone-IV E USB Blaster JTAG header VCC(TRGT)

Dear sir,

I am using cyclone -IV E FPGA in JTAG chain.
I don't have free pins on JTAG header on the board to connect, 2.5V to pin number 4 of USB blaster cable.
Can I connect 3.3V to pin number 4(VCC(TRGT) of USB blaster as 3.3V is already available in JTAG header ?
I am using 20 pin connector to connect a. Board RS232 links b. JTAG programming of non-altera devices c. JTAG debuggers for debugging MIPS processor and so on.

Please find the attachment of 20 pin JTAG connector and the signals.

Please clarify.

Regards,
Thulasi

Attached Images

• jtag.jpg (41.1 KB)