W90P710_05 Datasheet, PDF (129/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
Continued.
BITS
[12:8]
[7:5]
[4:0]
PHYAD
Reserved
PHYRAD
DESCRIPTIONS
The PHY Address keeps the address to differentiate which external
PHY is the target of the MII management command.
-
The PHY Register Address keeps the address to indicate which
register of external PHY is the target of the MII management
command.
MDCCR [23:20]
4’b0000
4’b0001
4’b0010
4’b0011
4’b0100
4’b0101
4’b0110
4’b0111
4’b1000
4’b1001
4’b1010
4’b1011
4’b1100
4’b1101
4’b1110
4’b1111
MDC CLOCK PERIOD
4 x T_HCLK
6 x T_HCLK
8 x T_HCLK
12 x T_HCLK
16 x T_HCLK
20 x T_HCLK
24 x T_HCLK
28 x T_HCLK
30 x T_HCLK
32 x T_HCLK
36 x T_HCLK
40 x T_HCLK
44 x T_HCLK
48 x T_HCLK
54 x T_HCLK
60 x T_HCLK
MDC CLOCK FREQUENCY
HCLK/4
HCLK/6
HCLK/8
HCLK/12
HCLK/16
HCLK/20
HCLK/24
HCLK/28
HCLK/30
HCLK/32
HCLK/36
HCLK/40
HCLK/44
HCLK/48
HCLK/54
HCLK/60
MII Management Function Frame Format
In IEEE Std. 802.3 clause 22.2.4, the MII management function is defined. The MII management
function is used for the purpose of controlling the PHY and gathering status from the PHY. The MII
management frame format is shown as follow.
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Publication Release Date: January 17, 2005
Revision A.2