In the current Concerto F28M36x Reference Manual (SPRS825A –OCTOBER 2012–REVISED APRIL 2013) the Ethernet MAC Block Diagram (fig. 21-2) shows the MDIX register. In the F28M36x Support Library version 2.01 the register is defined in hw_ethernet.h:
#define MAC_O_MDIX 0x00000044 // Ethernet PHY MDIX
as well as its content:
//*****************************************************************************
// The following are defines for the bit fields in the MAC_O_MDIX register.
//*****************************************************************************
#define MAC_MDIX_EN 0x00000001 // MDI/MDI-X Enable
However, this register is not described in the Reference Manual, nor mentioned in the data sheet.
So, my question is: does the Concerto support this register (and if so, what is the functional description), or has it perhaps an auto-MDIX feature?