Customer gets strange output signal for TPS92512-Q1:
After the second access the TPS doesn`t get to tri-state as its output is always active low(0), otherwise the pullup would force a high signal.
Additionally he found that after the first write command(reset) der TPS answers with an SPI error.
For clarification please see following measurements :
Channel 1 (yellow) = clock
Channel 2 (blue) = SPI select signal
Channel 3 (magenta) = SPI input
Channel 4 (green) = SPI output
TEK00006 : Measurement of the first two accesses after power-on reset
TEK00007 : Zoom of the first access
TEK00008 : Zoom of the second access
TEK00003 : Measurement of the third and fourth access
TEK00004 : Zoom of the third access
TEK00005 : Zoom of the fourth access
Is there any explanation for that?
Regards, Bernd