7.2 Extended Registers
7.2.1 PHY Status Register (PHYSTS)
This register provides a single location within the register set for quick access to commonly accessed information.
Table 21. PHY Status Register (PHYSTS), address 0x10
Bit
15
14
Bit Name
RESERVED
MDI-X mode
Default
0, RO
0, RO
Description
RESERVED: Write ignored, read as 0.
MDI-X mode as reported by the Auto-Negotiation logic:
This bit will be affected by the settings of the MDIX_EN and
FORCE_MDIX bits in the PHYCR register. When MDIX is en-
abled, but not forced, this bit will update dynamically as the
Auto-MDIX algorithm swaps between MDI and MDI-X configu-
rations.
1 = MDI pairs swapped
(Receive on TPTD pair, Transmit on TPRD pair)
0 = MDI pairs normal
(Receive on TRD pair, Transmit on TPTD pair)
Receive Error Latch:
13
12
Receive Error Latch
Polarity Status
0, RO/LH
This bit will be cleared upon a read of the RECR register.
1 = Receive error event has occurred since last read of RXERCNT
(address 0x15, Page 0).
0 = No receive error event has occurred.
0, RO
Polarity Status:
This bit is a duplication of bit 4 in the 10BTSCR register. This bit will
be cleared upon a read of the 10BTSCR register, but not upon a
read of the PHYSTS register.
1 = Inverted Polarity detected.
0 = Correct Polarity detected.
11
False Carrier Sense
Latch
0, RO/LH
False Carrier Sense Latch:
This bit will be cleared upon a read of the FCSR register.
1 = False Carrier event has occurred since last read of FCSCR (ad-
dress 0x14).
0 = No False Carrier event has occurred.
100Base-TX unconditional Signal Detect from PMD.
100Base-TX Descrambler Lock from PMD.
Link Code Word Page Received:
10
9
Signal Detect
Descrambler Lock
Page Received
0, RO/LL
0, RO/LL
0, RO
8
This is a duplicate of the Page Received bit in the ANER register,
but this bit will not be cleared upon a read of the PHYSTS register.
1 = A new Link Code Word Page has been received. Cleared on
read of the ANER (address 0x06, bit 1).
0 = Link Code Word Page has not been received.
7
6
MII Interrupt
0, RO
0, RO
MII Interrupt Pending:
1 = Indicates that an internal interrupt is pending. Interrupt source
can be determined by reading the MISR Register (0x12h). Reading
the MISR will clear the Interrupt.
0= No interrupt pending.
Remote Fault
Remote Fault:
1 = Remote Fault condition detected (cleared on read of BMSR (ad-
dress 01h) register or by reset). Fault criteria: notification from Link
Partner of Remote Fault via Auto-Negotiation.
0 = No remote fault condition detected.
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