ARM Technical Support Knowledge Articles

ADUC7020 MAPS ADCBUSY TO JTAG TRST SIGNAL

Applies to: ULINK USB-JTAG Debugger

Answer


Information in this article applies to:


QUESTION

I have used the Analog Devices ADuC7020 Development Kit together with Keil µVision3 and the Keil CARM Compiler. Since I have configured the chip to use the ADCBUSY signal on IO Pin P0.3 the ULINK is dead. I know that this pin is shared with the TRST signal that is used by the JTAG interface, but I would like to know if there is an alternative solution to this problem.

ANSWER

You are correct. The problem lies with the fact that P0.3 is used for both TRST and ADCBUSY. You can just re-configure the I/O pins so that the ADCBUSY uses the P0.5 as output. In this way, there is no collision.

MORE INFORMATION

Article last edited on: 2007-01-28 19:15:43

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