Figure 22. mdi state, Mdi state, Figure 22 – Intel IXF1104 User Manual

Page 102: Intel

Intel

IXF1104 4-Port Gigabit Ethernet Media Access Controller

Datasheet

102

Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005

Figure 22. MDI State

Idle

Preamble

Go = 1

Cnt = 32

Cnt < 32

Start Bits

Cnt = 2

Cnt < 2

Cnt > 32

Cnt > 2

Op Code

Phy Addr

Cnt = 2

Cnt < 2

Cnt > 5

Cnt < 5

Reg Addr

Cnt = 5

Cnt < 5

Cnt > 5

Turn Around

Cnt > 2

Cnt < 2

Cnt = 2

Data

Cnt < 16

Cnt > 16

Cnt = 16 And Go = 1

or (Cnt = 16 and
Go = 0)

MDOE = 0
MDO = 0
MDC_EN = 0

MDOE = 1
MDO = 1
MDC_EN = 1

MDOE = 1
MDO = Reg_Bit_St(Cnt)
MDC_EN = 1

MDOE = 1
MDO = Reg_Bit_Op(Cnt)
MDC_EN = 0

MDOE = 1
MDO = Reg_Bit_PA(Cnt)
MDC_EN = 1

MDOE = 1
MDO = Reg_Bit_RA(Cnt)
MDC_EN = 1

MDOE = Wr_Op
MDO = Reg_Bit_WO(Cnt)
MDC_EN = 1

MDOE = Wr_Op
MDO = Data(Cnt)
MDC_EN = 1