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Part Number: UCD90120A
I created a project with address 104d. Then I would like to change it to 126d. I click on build system->modify existing system. But I couldn't find the 126d in the address list anymore. Any idea?
Why do you want to use 126? address 126 is a special address to enable the JTAG. Please refer 120A DS to see how to force the device into 126 address.
TI Power Sequencer
Fusion GUI 7.0 for UCD90xxx
UCD90320 PMBus Command Reference Manual
UCD90xxx PMbus Command Reference Manual
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In reply to yihe:
Because I want to use Fusion + JTAG to program the device. In this case, I need to change the address to 126d, right?
In reply to Yee Yong Teo:
1) There is no association between the address 126 and JTAG other than they both occur when powering up an uncofigured UCD device. The address is not used as part of downloading the configuration via JTAG.
2) The address selection within the Fusion GUI is provided as a conviencience for the designer to track which device they are working on but it is not actually required to match the address of the device to which it will be written.
3) The association between project file and device occurs during the actual download process.
4) The final address of each UCD device will be determined by the hardwired resistors on the address pins not by the address in the project file.
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