[Gb-ccb] ping

[Martin Shepherd]

Hi Rich,

On Mon, 7 Nov 2005, Richard Lacasse wrote:
>...
> For the 1 cm receiver, pin 6 is open and pin 8 is grounded.
> I just verified that this is the case with a meter.
>
> Per the schematics, pin 6 corresponds to IP_ADDR_ID_0 and pin 8 to 
> IP_ADDR_ID_1.  These pins are routed to some pull-up resistors and an 
> inverter-buffer, U40, or sheet 8.

Yes, the inverter makes the ID pins on the cable active-low. Thus,
when you set IP_ADDR_ID_0 to high, and IP_ADDR_ID_1 to low, I read
2. This all makes sense. Are all of the cables designed to have
active-high ID pins?  If so, I will change the driver, to have it
invert these bits before reporting them. The pins will then
effectively be active high.

Martin