5.1.6 MMD Access Address/Data Register

Name: MMDAD
Address: 0x0E

Bit 15141312111098 
 ADR_DATA[15:8] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 
Bit 76543210 
 ADR_DATA[7:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 

Bits 15:0 – ADR_DATA[15:0] MMD Address / Data

Functionality depends on the MMD Function (FNCTN) bits in the MMD Access Control (MMDCTRL) register as specified in IEEE Std 802.3 Annex 22D:

  • 00b = Writing this field sets the offset of the register within the MMD to access
  • 01b, 10b, 11b = When written, the contents are written into the MMD register
  • 01b, 10b, 11b = When read, the contents from the MMD register are returned