JTAG did not work.

[Altera_Forum]

Hello all. We are make PCIe board at Aria GX2. It's highly simplified kit from Altera. The DC/DC is working very good. But JTAGs didn't work at all.  

I can see signals at JTAG TDI, TMS, TCK but nothing at TDO. I'm try to connect TDI to MAX-II and ArriaGX-II in parallel and disconnect MAX TDO from Arria TDI. But I can't see signals at MAX TDO and Attia TDO.   I'm use 2.5v to supply MAX and Arria JTAG banks.  MSELs connected to ground. nConfig and nStatus I'm pull up.

[Altera_Forum]

This is a test.

[Altera_Forum]

--- Quote Start ---  This is a test.  --- Quote End ---   You test is ok. Jtag is't ok.

[Altera_Forum]

The JTAG tap controller enables TDO, when it's state advances to a SHIFT_DR or SHIFT_IR state. Never reaching this state (respectively not seeing TDO activated) in standard JTAG scan and similar actions most likely indicates: 

- device is held in reset, because one of the supply voltages required for JTAG operation (see the manual for details) is below it's reset threshold - TMS, TCK or TDO are not connected correctly

[Altera_Forum]

--- Quote Start ---  The JTAG tap controller enables TDO, when it's state advances to a SHIFT_DR or SHIFT_IR state. Never reaching this state (respectively not seeing TDO activated) in standard JTAG scan and similar actions most likely indicates: - device is held in reset, because one of the supply voltages required for JTAG operation (see the manual for details)   --- Quote End ---   Volatges is ok. Core - ok and IO Bank is ok.    --- Quote Start ---    is below it's reset threshold - TMS, TCK or TDO are not connected correctly  --- Quote End ---   I'm check this many times. It's ok. I'm even solder wire direct from JTAG pin to closed via from Arria chip.

[Altera_Forum]

According to the device manual, POR is monitoring these supply voltages: 

VCCCB, VCCA_PLL, VCC, VCCPD, and VCCIO for I/O banks 3C or 8C

[Altera_Forum]

--- Quote Start ---  According to the device manual, POR is monitoring these supply voltages: VCCCB, VCCA_PLL, VCC, VCCPD, and VCCIO for I/O banks 3C or 8C  --- Quote End ---   All voltages, pll, etc, is ok.