Ethernet Physical Transceiver (EPHY)
MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor
19-13
19.3.3.3
EPHY Identifier Register 1
The EPHY Identifier Registers 1 and 2 provide the PHY identification code.
Figure 19-8. EPHY Identifier Register 1
19.3.3.4
EPHY Identifier Register 2
The EPHY Identifier Registers 1 and 2 provide the PHY identification code.
Figure 19-9. EPHY Identifier Register 2
19.3.3.5
Auto-Negotiate (A/N) Advertisement Register
The auto-negotiation (A/N) process requires four registers to communicate link information with its link
partner: A/N advertisement register (MII register 4), A/N link partner ability register (MII register 5), A/N
expansion register (MII register 6), and the A/N next page transmit register (MII register 7).
shows the contents of the A/N advertisement register. On power-up, before A/N starts, the
register sets the selector field, bits 4.4:0, to 00001 to indicate that it is IEEE Standard 802.3 compliant. The
MII Register Address: 0x02
Access: User read/write
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
PHYID
W
Reset
0
0
0
0
0
0
0
0
0
0
1
0
1
1
0
0
Table 19-8. EPHY Identifier Register 1 Field Descriptions
Field
Description
15–0
PHYID
PHY ID Number. Composed of bits 3:18 of the organization unique identifier (OUI).
MII Register Address: 0x03
Access: User read/write
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
PHYID
MODELNUMBER
REVISIONNUMBER
W
Reset
0
0
0
1
1
0
0
0
0
0
0
1
0
0
0
1
Table 19-9. EPHY Identifier Register 2 Field Descriptions
Field
Description
15–10
PHYID
PHY ID number organization unique identifier. Composed of bits 19:24.
9–4
MODELNUMBER
Manufacturers model number. Composed of bits 9:4.
3–0
REVISIONNUMBER
Manufacturers revision number. Composed of bits 3:0.
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
