Rainbow Electronics W90N740 User Manual
Page 95
W90N740
Publication Release Date: November 26, 2004
- 91 -
Revision A4
MAC MII Management Data Control and Address Register (MIIDA_0, MIIDA_1)
Register Address R/W
Description
Reset
Value
MIIDA_0
0xFFF0.3094 R/W MII Management Data Control and Address Register 0x00A0.0000
MIIDA_1
0xFFF0.3894 R/W MII Management Data Control and Address Register 0x00A0.0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
MDCCR MDCON
PreSP
BUSY
WR
15
14
13
12
11
10
9
8
Reserved PHYAD
7
6
5
4
3
2
1
0
Reserved PHYRAD
MDCCR [23:20]: MDC clock rating
Default value: 0x009
The 4-bit value is to set the MDC clock period.
MDCCR [23:20]
MDC clock period
0 0 0 0
4
x
(1/Fmclk)
0 0 0 1
6
x
(1/Fmclk)
0 0 1 0
8
x
(1/Fmclk)
0 0 1 1
12
x
(1/Fmclk)
0 1 0 0
16
x
(1/Fmclk)
0 1 0 1
20
x
(1/Fmclk)
0 1 1 0
24
x
(1/Fmclk)
0 1 1 1
28
x
(1/Fmclk)
1 0 0 0
30
x
(1/Fmclk)
1 0 0 1
32
x
(1/Fmclk)
1 0 1 0
36
x
(1/Fmclk)
1 0 1 1
40
x
(1/Fmclk)
1 1 0 0
44
x
(1/Fmclk)
1 1 0 1
48
x
(1/Fmclk)
1 1 1 0
54
x
(1/Fmclk)
1 1 1 1
60
x
(1/Fmclk)
Default MDCCR [23:20] = 9