What are voltage threshold in HTL mode (current source off)?

Hello,

My apologies for the delayed response on this.  

I can see how the don't care (X) label is a bit misleading in this case.  While the status of the HITHR bit is not required to set the mode to high-impedance or HTL (CURR_ = 00) , it is still required to set the thresholds, as outlined in the datasheet. You need to set the SOURCE and HITHR bits for a given channel to set the threshold, as shown in the EC table on pages 5-6.

Setting the CURR_ bits to 11 will put the input channel into TTL mode.  The TTL thresholds are also shown in the EC table.

Thank you,

Shasta

Hello,

My apologies for the delayed response on this.  

I can see how the don't care (X) label is a bit misleading in this case.  While the status of the HITHR bit is not required to set the mode to high-impedance or HTL (CURR_ = 00) , it is still required to set the thresholds, as outlined in the datasheet. You need to set the SOURCE and HITHR bits for a given channel to set the threshold, as shown in the EC table on pages 5-6.

Setting the CURR_ bits to 11 will put the input channel into TTL mode.  The TTL thresholds are also shown in the EC table.

Thank you,

Shasta