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iMX6 JTAG_MOD as GPIO

Question asked by Dmitry Kolyadintsev on Nov 14, 2017
Latest reply on Nov 30, 2017 by Dmitry Kolyadintsev

Hello,

 

We are using IMX6UL (MCIMX6G3CVM05AB) for custom board and due to limited number of pins want to use JTAG_MOD as GPIO output. At the same time we want to use JTAG for system debug during development phase.

 

RM 45.2 states that "this pin is sampled at TRST reset to determine mode of operation" - does that mean that changing this pin to GPIO output high after startup (when TRST is high) won't affect JTAG operation? JTAG_TRST is not used and is pulled high permanently.

 

Thanks,

Dmitry

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