LS1026 I2C JTAG

[itzik1]

Hello,

Could anybody toggle I2C pins on LS1026 during JTAG test?

These are not toggling in my board while in operational mode all is ok to all I2C devices.

Thanks,

Itzik

[itzik1 · Accepted solution]

The test engineer found the solution:

Not like the LS1046, the LS1026 I2C/UART Power Bank need to be Configured before it can be used in JTAG Mode, so added extra command before each test that use this Power Bank.

[Pavel]

Test other pins on your LS1026a board. Perhaps there are a few similar pins on your board.

If the LS1026a I2C correctly works in normal mode, your JTAG test setting should be checked.

[itzik1]

Other bus like DDR, SPI are function OK in JTAG

Only problem with DVDD pins (I2C, UART)

[itzik1]

Pins have been verified , we have checked with  a scope and found pins are not toggling at all in JTAG Mode while other pins are toggling.

I2C pins are working fine in normal mode.