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IXF1104 Quad-Port 10/100/1000 Mbps Ethernet Media Access Controller
Datasheet 101
Document Number: 278757
Revision Number: 007
Revision Date: March 25, 2004
Figure 22. MDI State
Idle
Preamble
Go = 1
Cnt = 32
Cnt < 32
Start Bits
Cnt = 2
Cnt < 2
Cnt > 32
Cnt > 2
Cnt > 2
Op Code
Phy Addr
Cnt = 2
Cnt < 2
Cnt > 5
Cnt < 5
Reg Addr
Cnt = 5
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