PCS PMA TEMAC Status Register - 7.2 English - PG138

AXI 1G/2.5G Ethernet Subsystem Product Guide (PG138)
Document ID
PG138
Release Date
2024-06-05
Version
7.2 English

The PCS PMA TEMAC Status (PPST) register is shown in the following figure. This register reports valid information when the subsystem is configured for SGMII or 1000BASE-X with the TEMAC operating at 10/100/1000 Mb/s (C_TYPE = 1 and C_PHY_TYPE = 4 or 5). It provides additional information about the serial interface status. For all other configurations, this register returns zeros.

Figure 1. PCS PMA TEMAC Status Register (0x0000_0030) AXI Ethernet Page-1 Layer_1 Sheet.3 Sheet.4 Sheet.5 Sheet.6 Sheet.7 Sheet.8 Sheet.9 Sheet.10 Sheet.11 Sheet.12 Sheet.105 8 8 Sheet.106 31 31 Sheet.107 7 7 Sheet.108 6 6 Sheet.109 Reserved Reserved Sheet.110 LinkStatus LinkStatus Sheet.111 LinkSync LinkSync Sheet.112 5 5 Sheet.113 4 4 Sheet.114 2 2 Sheet.115 1 1 Sheet.116 0 0 Sheet.117 3 3 Sheet.118 RUDI_I RUDI_I Sheet.119 RUDI_C RUDI_C Sheet.120 RUDI_INVLD RUDI_INVLD Sheet.121 RXNOTINTABLE RXNOTINTABLE Sheet.122 RXDISPERR RXDISPERR Sheet.123 PhyLinkStatus PhyLinkStatus Sheet.125 MSB MSB Sheet.126 LSB LSB Sheet.127 Sheet.128 Sheet.129 Sheet.130 Sheet.131 14 14 Sheet.132 13 13 Sheet.133 12 12 Sheet.134 10 10 Sheet.135 9 9 Sheet.136 11 11 Sheet.137 RmtFlt RmtFlt Sheet.138 Duplex Duplex Sheet.139 RmtFltEnc RmtFltEnc Sheet.140 Speed Speed Standard Arrow.1 Standard Arrow.59 Sheet.15 Sheet.16 Sheet.17 Sheet.18 Sheet.19 Sheet.20 Sheet.21 Standard Arrow.22 Standard Arrow.23 Standard Arrow.24 Standard Arrow.25 Sheet.26 X14038 X14038

The following table shows the PCS PMA TEMAC Status register bit definitions.

Table 1. PCS PMA TEMAC Status Register (0x0000_0030)
Bits Name Access Reset Value Description
31:14 Reserved RO 0x000000 Reserved
13 RmtFlt RO 0 RmtFlt: Remote Fault (1000BASE-X only)

When this bit is logic one, it indicates that a remote fault is detected and the type of remote fault is indicated by bits[9:8].

Note: This bit is only de-asserted when an MDIO read is made to status register (register 1 in See Management Status Register (Register 1) ). This signal has no significance in SGMII PHY mode.
12 Duplex RO 0 Duplex: Duplex Mode. This bit indicates the Duplex mode negotiated with the link partner
  • 1 = Full-Duplex
  • 0 = Half-Duplex
  • Half-Duplex is not supported
11:10 Speed RO 00 Speed: Speed. This signal indicates the speed negotiated and is only valid when Auto-Negotiation is enabled. The signal encoding is:
  • 11 = Reserved
  • 10 = 1000 Mb/s
  • 01 = 100 Mb/s
  • 00 = 10 Mb/s
9:8 RmtFltEnc RO 00 RmtFltEnc: Remote Fault Encoding (1000BASE-X only).

This signal indicates the remote fault encoding (IEEE 802.3-2008 table 37-3). This signal is validated by bit 13, RmtFlt, and is only valid when Auto-Negotiation is enabled.
7 PhyLinkStatus RO 0 PhyLinkStatus: PHY Link Status (SGMII only).

When operating in SGMII mode, this bit represents the link status of the external PHY device attached to the other end of the SGMII link (High indicates that the PHY has obtained a link with its link partner; Low indicates that is has not linked with its link partner). When operating in 1000BASE-X mode this bit remains Low and should be ignored.
6 RXNOTINTABLE RO 0 RXNOTINTABLE: Receive Not In Table. The subsystem has received a code group which is not recognized from the 8B/10B coding tables.
5 RXDISPERR RO 0 RXDISPERR: Receive Disparity Error.The subsystem has received a running disparity error during the 8B/10B decoding function.
4 RUDI_INVLD RO 0 RUDI_INVLD: RUDI(/INVALID/). The subsystem has received invalid data while receiving/C/ or/I/ ordered set.
3 RUDI_I RO 0 RUDI_I: RUDI(/I/). The subsystem is receiving /I/ ordered sets (Idles)
2 RUDI_C RO 0 RUDI_C: RUDI(/C/). The subsystem is receiving /C/ ordered sets (Auto-Negotiation Configuration sequences).
1 LinkSync RO 0 LinkSynch: Link Synchronization. This signal indicates the state of the synchronization state machine (IEEE802.3 figure 36-9) which is based on the reception of valid 8B/10B code groups. This signal is similar to Bit[0] (Link Status), but is NOT qualified with Auto-Negotiation. When High, link synchronization has been obtained and in the synchronization state machine, sync_status = OK. When Low, synchronization has failed.
0 LinkStatus RO 0 LinkStatus: Link Status. This signal indicates the status of the link. When High, the link is valid: synchronization of the link has been obtained and Auto-Negotiation (if present and enabled) has successfully completed. When Low, a valid link has not been established. Either link synchronization has failed or Auto-Negotiation (if present and enabled) has failed to complete. When auto-negotiation is enabled this signal is identical to Bit[1].