Specifications

Physical Layer Simplified Specification Version 4.10

141

31-22

21-18

16-00

10-bit

4-bit

1-bit

17-bit

Reserved (0000000000b)

FNO

Start Address of a Register Set

Bit 21-18: 4-bit FNO for Memory Space

Bit 21-19: 3-bit FNO for I/O Space. (Bit 18=0).

Table 5-24 : Field Definition of Extension Register Set Address

Refer to Appendix F.1 about how to identify Function Driver.

5.7.4 Revision Management

A function should assign Revision Register in the Function Extension Register Set to indicate the

function revision. Functionality of the function may be extended by increasing the function revision.

Higher revision shall include all functionality of lower revision to keep compatibility. Function Driver has

driver revision which is correspond to the function revision. Any revision of function shall be able to be

used with any revision combination of function driver. By reading the Revision Register, Function Driver

knows usable functionality which is determined by lower revision of either function or driver.