LX2160A CEX-7 JTAG

The LX2160A COM-Express Type 7 Module provides an ARM CoreSight compatible 10-pin header (also known as 9-pin Cortex-M) labeled U3014, for use with an external debugger such as J-Link, or NXP's CodeWarrior TAP:

lx2160a-cex7-jtag.png

Decoupling TRST_B and PORESET_B

The CEX-7 Module internally connects from PORESET_B to TRST_B making it impossible to debug the first stage of boot while RCW is being loaded.

It is possible to remove zero ohm 0402 resistor R9399 which results in TRST_B floating. It is located below the heat-sink, as shown below:

lx2160a-cex7-jtag-r9399-location.png

lx2160a-cex7-jtag-r9399-location-magnified.png

Connecting JTAG Adapters

The connection between JTAG and board must not swap any wires. Pin 1 on the JTAG Adapter must go to Pin 1 on the Board (indicated by white arrow) to avoid damaging SoC and the JTAG device. See below the correct orientations for tested adapters:

ARM 10-Pin Adapter

lx2160-cex7-arm-jtag-adapter-connected.jpg

Connecting CodeWarrior TAP

codewarrior-tap-connected.jpg

lx2160-cex7-codewarrior-tap-connected.jpg

Using CodeWarrior Software with CodeWarrior TAP

The CodeWarrior TAP can be connected either via Ethernet on the LAN or direct on a USB port.

On the LAN the tap acquires a DHCP lease and responds to hostname "FSLXXYYZZ" where XXYYZZ are the last 3 octets of its MAC address as indicated on the white sticker on the bottom of the tap. E.g. "FSL06BB1D" for tap with mac address "00:04:9F:06:BB:1D".

Within the CodeWarrior Software the TAP is automatically usable when connected over USB. In case of Ethernet / LAN the hostname must be entered to the "Probe Address" Column of "Target connections" UI:

codewarrior-tap-address.png

OpenOCD

See LX2160 JTAG with OpenOCD for details.