80220 Datasheet, PDF (34/91 Pages) LSI Computer Systems – 100BASE-TX/10BASE-T Ethernet Media Interface Adapter

80220/80221
0.15
RST
R/WSC
0.7
COLTST
R/W
Table 10. MI Register 0 (Control) Structure And Bit Definition
0.14
LPBK
R/W
0.13
SPEED
R/W
0.12
ANEG_EN
R/W
0.11
PDN
R/W
0.10
MII_DIS
R/W
0.9
ANEG_RST
R/WSC
0.6
0.5
0
0
R/W
R/W
0.4
0.3
0.2
0.1
0
0
0
0
R/W
R/W
R/W
R/W
0.8
DPLX
R/W
0.0
0
R/W
Bit Symbol
Name
Definition
0.15 RST
Reset
1 = Reset, Bit Self Clearing After Reset Completed
0 = Normal
0.14 LPBK
Loopback Enable
1 = Loopback Mode Enabled
0 = Normal
0.13 SPEED
Speed Select
1 = 100 Mbps Selected (100BaseTX)
0 = 10 Mbps Selected (10BaseT)
0.12 ANEG_EN AutoNegotiation
Enable
1 = AutoNegotiation Enabled
0 = Normal
0.11 PDN
Powerdown Enable 1 = Powerdown
0 = Normal
0.10 MII_DIS
MII Interface
Disable
1 = MII Interface Disabled
0 = Normal
0.9 ANEG_RST AutoNegotiation
Reset
1 = Restart AutoNegotiation Process, Bit Self
Clearing After Reset Completed
0 = Normal
0.8 DPLX
Duplex Mode
Select
1 = Full Duplex
0 = Half Duplex
0.7 COLTST
Collision Test
Enable
1 = Collision Test Enabled
0 = Normal
0.6
Reserved
thru
0.0
x.15 Bit Is Shifted First
Note 1: if MDA[4:0] not = 11111, then the MII_DIS default value is changed to 0
R/W Def.
R/W 0
SC
R/W 0
R/W 1
R/W 1
R/W 0
R/W 1¹
R/W 0
SC
R/W 0
R/W 0
R/W 0
34
MD400159/E