參數(shù)資料
型號(hào): NQ80220
廠商: LSI CORP
元件分類: 網(wǎng)絡(luò)接口
英文描述: 100BASE-TX/10BASE-T Ethernet Media Interface Adapter
中文描述: DATACOM, ETHERNET TRANSCEIVER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 26/91頁
文件大?。?/td> 907K
代理商: NQ80220
80220/80221
MD400159/E
32
Table 8. MI Serial Port Frame Structure
<Idle>
<Start>
<Read>
<Write>
<PHY Addr.>
<Reg. Addr.>
<Turnaround>
<Data>
IDLE
ST[1:0]
READ
WRITE
PHYAD[4:0]
REGAD[4:0]
TA[1:0]
D[15:0]....
Register 0
Control
Register 1
Status
Register 2
PHY ID #1
Register 3
PHY ID #2
Register 4
AutoNegotiation Advertisement
Register 5
AutoNegotiation Remote End Capability
Register 16
Configuration 1
Register 17
Configuration 2
Register 18
Status Output
Register 19
Mask
Register 20
Reserved
Symbol
Name
Definition
R/W
IDLE
Idle Pattern
These bits are an idle pattern. Device will not initiate an
W
MI cycle until it detects at least 32 1's.
ST1
Start Bits
When ST[1:0]=01, a MI Serial Port access cycle starts.
W
ST0
READ
Read Select
1 = Read Cycle
W
WRITE
Write Select
1 = Write Cycle
W
PHYAD[4:0]
Physical Device
When PHYAD[4:0]=MDA[4:0] pins inverted, the MI Serial
W
Address
Port is selected for operation.
REGAD4[4:0]
Register Address
If REGAD[4:0]=00000-11110, these bits determine the
W
specific register from which D[15:0] is read/written. If multiple
register access is enabled and REGAD[4:0]=11111, all
registers are read/written in a single cycle.
TA1
Turnaround Time
These bits provide some turnaround time for MDIO
R/W
TA0
When READ=1, TA[1:0]=Z0
When WRITE=1, TA[1:0]=ZZ
D[15:0]....
Data
These 16 bits contain data to/from one of the eleven registers
Any
selected by register address bits REGAD[4:0].
IDLE is shifted in first
4.0 Register Description
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