AN2692 Freescale Semiconductor / Motorola, AN2692 Datasheet - Page 32

• Manufacturer Part Number: AN2692
• Description: MC9S12NE64 Integrated Ethernet Controller
• Manufacturer: Freescale Semiconductor / Motorola

MC9S12NE64 Ethernet Physical Transceiver (EPHY)
Auto-Negotiate Advertisement Register
The configuration of this register determines which functional capabilities the EPHY advertises during the
auto-negotiation process. The advertisement options that can be set by the auto-negotiate advertisement
register are:
32
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Reset:
Reset:
Read:
Read:
Write:
Write:
ANCOMP and ANNC — Both indicate whether auto-negotiation is complete. ANNC is a duplicate
of ANCOMP. When auto-negotiation is enabled, the contents of MII management registers 4
through 7 are valid. When auto-negotiation is complete, the EMAC must be adjusted to ensure that
duplex and flow control settings are correct (by referencing the DPMD and SPD bits). The user is
notified of a change in auto-negotiation by an EPHY interrupt.
LNKSTST and LNK — If LNKSTST = 1 (a link is established), LNK must be clear (LNK = 0). An
EPHY interrupt indicates a change in the network link.
PDMD — Indicates the current duplex mode of the PHY. When set, the PHY is operating in full-
duplex mode. When clear, operation is half-duplex.
SPD — Indicates the current speed mode of the PHY. When set, the PHY is operating in 100 Mbps
mode. When clear, operation is 10 Mbps mode.
PRCVD and ANC_MODE: Indicate status of auto-negotiation process. When PRCVD = 1, the
auto-negotiation base page has been received. If ANC_MODE = 1, auto-negotiation not resolved
to a common operating mode. See the
NXTP — Next page capability
FLC_TL — Flow control capability
TAF_100FD — 100BASE-TX full-duplex capability
TAF_100HD — 100BASE-TX half-duplex capability
TAF_10FD — 10BASE-T full-duplex capability
TAF_10HD — 10BASE-T half-duplex capability
Figure 25. Auto-Negotiate Advertisement Register (MII Management Register 4)
NXTP
15
15
0
1
0
Figure 24. Proprietary Status Register (MII Management Register 17)
LNK
14
14
0
0
0
PDMD
RFLT
13
13
1
0
SPD
MC9S12NE64 Integrated Ethernet Controller, Rev. 0.2
12
12
X
0
0
11
11
0
0
0
0
FLCTL
ANNC PRCVD
10
10
0
0
Auto-Negotiate Advertisement Register
9
0
9
0
0
MODE
100FD
ANC
TAF
8
1
8
1
100HD
TAF
1
7
0
0
7
10FD
TAF
6
0
6
1
0
10HD
PLR
TAF
5
0
5
1
0
4
0
0
4
SELECTOR FIELD [4:0]
3
0
3
0
0
Freescale Semiconductor
section.
0
2
0
0
2
1
0
1
0
0
0
0
0
0
0