參數(shù)資料
型號(hào): DS33ZH11
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 網(wǎng)絡(luò)接口
英文描述: Ethernet Mapper
中文描述: DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PBGA100
封裝: 10 X 10 MM, 1.41 MM HEIGHT, 0.80 MM PITCH, CSBGA-100
文件頁數(shù): 49/169頁
文件大?。?/td> 1049K
代理商: DS33ZH11
DS33Z11 Ethernet Mapper
49 of 169
8.14.3 PHY MII Management Block and MDIO Interface
The MII Management Block allows for the host to control up to 32 PHYs, each with 32 registers. The MII block
communicates with the external PHY using 2-wire serial interface composed of MDC (serial clock) and MDIO for
data. The MDIO data is valid on the rising edge of the MDC clock. The Frame format for the MII Management
Interface is shown
Figure 8-8
. The read/write control of the MII Management is accomplished through the indirect
SU.MACMIIA MII Management Address Register and data is passed through the indirect SU.MACMIID Data
Register. These indirect registers are accessed through the MAC Control Registers defined in
Table 8-6
. The
MDC clock is internally generated and runs at 1.67 MHz.
Figure 8-8 MII Management Frame
READ
111...111
01
01
10
01
PHYA[4:0]
PHYR[4:0]
ZZ
10
ZZZZZZZZZ
Z
Z
Preamble
Start
Opco
de
Phy Adrs
Phy Reg
Turn
Aroun
d
2 bits
Data
111...111
PHYA[4:0]
PHYR[4:0]
PHYD[15:0]
32 bits
2 bits
2 bits
5 bits
5 bits
16
bits
Idle
1
Bit
WRITE
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