12 phy maintenance register – Rainbow Electronics AT91CAP9S250A User Manual
Page 821
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821
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
42.5.12
PHY Maintenance Register
Register Name:
EMAC_MAN
Access Type:
Read/Write
• DATA
For a write operation this is written with the data to be written to the PHY.
After a read operation this contains the data read from the PHY.
• CODE:
Must be written to 10. Reads as written.
• REGA: Register Address
Specifies the register in the PHY to access.
• PHYA: PHY Address
• RW: Read/Write
10 is read; 01 is write. Any other value is an invalid PHY management frame
• SOF: Start of frame
Must be written 01 for a valid frame.
31
30
29
28
27
26
25
24
SOF
RW
PHYA
23
22
21
20
19
18
17
16
PHYA
REGA
CODE
15
14
13
12
11
10
9
8
DATA
7
6
5
4
3
2
1
0
DATA
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