JTAG Test

FAQ: JTAG Scan does not work on Texas Instruments DSP

Filed under FAQ / JTAG IEEE 1149.1

Q: JTAG Scan does not work on Texas Instruments DSP

Answer:

Make sure the EMULx pins are tied low during the test. These default high, which disables the Boundary Scan mode from the JTAG port and places the part into Emulator mode. NOTE: On these processors the low to high transition of /TRST latches the state of the EMUx pins while the TCK is running.
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