Tool/software:
Kidde is looking to use the DP83869HM.
The datasheet mentions or indicates there is an AMDIX strap pin, but I only see a register setting. I cannot find a strap that is specific to MDIX.
Can you verify this and is this an error in the datasheet?
9.4.10.9 Auto-MDIX Resolution
The DP83869HM can determine if a straight or crossover cable is used to connect to the link partner. It
can automatically re-assign channel A and B to establish link with the link partner, (and channel C and
D in 1000BASE-T mode). Auto-MDIX resolution precedes the actual Auto-Negotiation process that involves
exchange of FLPs to advertise capabilities. Automatic MDI/MDIX is described in IEEE 802.3 Clause 40, section
40.8.2. It is not a required implementation for 10BASE-Te and 100BASE-TX.
Auto-MDIX can be enabled or disabled by strap, using the AMDIX Disable strap, or by register configuration,
using bit 6 of the PHYCR register (address 10h). When Auto-MDIX is disabled, the PMA is forced to either MDI
(straight) or MDIX (crossed). Manual configuration of MDI or MDIX can also be accomplished by strap, using the
Force MDI/X strap, or by register configuration, using bit 5 of the PHYCR register.
