Dm8168 dead JTAG clock

Debugging for new boards, not for EVM boards.

Ti xds560 connected to dm8168 20pin simulation interface

Launch 8168. ccxml, right-click cortexa8, and select connect target

The following error occurs:

"Error connecting to the target: (error-181 @ 0x0)

The Controller has detected a dead JTAG clock.

The user must turn-on or connect the JTAG clock for the target."

There may be two reasons:

① Dm8168 power-on Success reset (porn)

Check whether the dm8168 f37 pin porn is switched from low to high after power-on

If there is no, the power-on reset chip is measured and some basic door circuits are used for level-1 troubleshooting.

② Dm8168 JTAG exposed

If the 20 pin connector is manually welded, it will easily lead to different levels of pins

Cause poor contact with individual pins, resulting in Dead clock problems.

Dm8168 dead JTAG clock