5.4.53 OPEN Alliance Map ID and Version Register

Name: MIDVER
Address: 0xCA00

Bit 15141312111098 
 IDM[7:0] 
Access RORORORORORORORO 
Reset 00001010 
Bit 76543210 
 VER[7:0] 
Access RORORORORORORORO 
Reset 00010000 

Bits 15:8 – IDM[7:0] Register Map ID

This field uniquely identifies the OPEN Alliance address space for register mapping.
ValueDescription
0x0A OPEN Alliance register map

Bits 7:0 – VER[7:0] Register Map Version

This field specifies the register map version. The version number is represented in binary-coded-decimal.

Tip: This device conforms to the OPEN Alliance register map version 1.1 although this field indicates conformity to version 1.0. The only difference between the two register map specifications is the default value of the Transmit Opportunity Timer (TOTMR) bit field. Version 1.0 of the register map specifies a default TOTMR value of 24 whereas this device implements a default TOTMR value of 32 conforming to Clause 30 of the IEEE 802.3 specification. This discontinuity was resolved with OPEN Alliance register map version 1.1.
ValueDescription
0x10 OPEN Alliance register map version 1.0