Hi All,
I have been working with the TPIC8101 chip and must admit am a bit frustrated. 1st in Normal mode all of my SPI commands are echoed as the data sheet indicates they should be - including the entry into the TPIC8101 advanced SPI mode. However, the chip does not appear to be sensing (or at least reacting to the input signal). I do get the stair step ramp output from the Analog pin - although it seems to be triggered by noise and not the signal. I do not get any varying out put data from the SPi when I send it the Prescaler and Channel data as I would expect as a response if in the SPI advanced mode.
Finally in table 2 (Advanced mode), item no. 6 (Set SPI to advanced mode) indicates that if you are already in Advanced SPI mode and send the command code, tht rather than the echo back you get in normal mode for this command, you will get an inverted SPI configuration of 10001110 rather than response to the normal mode query of 1110 0001.
I send the Advance mode command (in normal mode) and get back the expected echo of 1110 0001. Now the SPI mode should now be in Advanced Mode, so according to item 6 in table 2, if I send the Advanced Mode command again, I should get the inverse or 1000 1110 - however, I do not receive that so apparently the TPIC8101 never goes into SPI advanced mode, so that is why I never get data back from the SPI Prescaler - Channel commands.
So if the TPIC8101 echos all the commands I sent in normal mode - why does it not enter Advance mode when I sent it that command.
Any ideas appreciated
Thanks
Ed