4-8
MC92603 Quad Gigabit Ethernet Transceiver Reference Manual
MOTOROLA
MDIO Registers
4.2.6
MDIO RA 6—Auto-Negotiation (AN) Expansion
Register
Figure 4-6 shows the format for the auto-negotiation (AN) expansion register, MDIO RA 6,
in the MC92603. All bits of register 6 are read-only and the register contains data received
from the link partner.
4.2.7
MDIO RA 7–14—Not Supported
MDIO RA 7–14 registers, as shown in Table 4-1, are not supported in the MC92603 PHY.
4.2.8
MDIO RA 15—Extended Status Register
Figure 4-7 shows the content of the extended status register, MDIO RA 15, and its state for
the MC92603. The register is read-only and may not be modified. The MC92603 only
supports 1000BASE-X, full-duplex operation. Therefore, bit 15 is forced to a one and bits
14–12 are forced to zeros.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
Reserved
Next Page Enable
Page Received
Reserved
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 4-6. AN Expansion Register (MDIO RA 6)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R 1000BASE-X
Full-Duplex
1000BASE-X
Half-Duplex
1000BASE-T
Full-Duplex
1000BASE-T
Half-Duplex
Reserved
W
Reset
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 4-7. Extended Status Register (MDIO RA 15)
Summary of Contents for MC92603
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