Xilinx UG194 Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC ...

More documents

Recommendations

Info

Chapter 6: Physical Interface Loopback itself can be enabled or disabled by writing to the PCS/PMA Sublayer Control Register (Register 0). The loopback position can be controlled through the Loopback Control Register (Register 17). See “1000BASE-X PCS/PMA Management Registers,” page 122 for details. Alternatively, loopback can be controlled by setting the EMAC#_PHYLOOPBACKMSB and EMAC#_GTLOOPBACK attributes. See Chapter 2 for details. Serial Gigabit Media Independent Interface (SGMII) Generic Host Bus DCR Bus Ethernet MAC PCS/PMA Sublayer Flow Control Interface Host Interface DCR Bridge Figure 6-27 shows the functional block diagram of the Ethernet MAC with the PCS/PMA sublayer block highlighted. EMAC# TX RX 16- or 8-Bit Client Interface Transmit Engine Flow Control Receive Engine Address Filter Registers MDIO Interface MAC Configuration Registers Figure 6-27: PCS/PMA Sublayer Block Diagram in the Ethernet MAC The PCS/PMA sublayer extends the functionality of the Ethernet MAC, replacing the GMII/MII or RGMII parallel interfaces with an interface to a RocketIO serial transceiver. The connected RocketIO serial transceiver then provides the remaining functionality to accommodate the following two standards, both of which require the high-speed serial interface provided by the RocketIO serial transceiver: “Serial Gigabit Media Independent Interface (SGMII)” “1000BASE-X PCS/PMA” TX RX Statistics Clock Management MII/GMII/RGMII Interface to External PHY GTP/GTX Transceiver Interface MDIO Interface to External PHY UG194_6_27_071709 178 www.xilinx.com TEMAC User Guide UG194 (v1.10) February 14, 2011 MII/GMII/RGMII Interface TX RX TX RX PCS/PMA Sublayer PCS Management Registers MDIO Intersection R
FPGA R Introduction to the SGMII Implementation PCS/PMA Sublayer Serial Gigabit Media Independent Interface (SGMII) The Serial GMII (SGMII) is an alternative interface to the GMII/MII that converts the parallel interface of the GMII/MII into a serial format that is capable of carrying traffic at speeds of 10 Mb/s, 100 Mb/s, and 1 Gb/s. It radically reduces the I/O count and is, therefore, often favored by PCB designers. The SGMII physical interface was defined by Cisco Systems. The data signals operate at a rate of 1.25 Gb/s. Due to the speed of these signals, differential pairs are used to provide signal integrity and minimize noise. The sideband clock signals defined in the specification are not implemented in the Ethernet MAC. Instead, the RocketIO serial transceiver is used to transmit and receive the differential data at the required rate using clock data recovery (CDR). For more information on SGMII, refer to the Serial GMII specification v1.7. Figure 6-28 shows an expanded diagram of the PCS/PMA sublayer block. The Ethernet MAC is connected to a RocketIO serial transceiver, which in turn connects to a Tri-Speed Ethernet BASE-T PHY device via SGMII. MAC TX Interface MAC RX Interface MDIO Interface PCS Transmit Engine Auto-Negotiation PCS Receive Engine and Synchronization PCS Management Registers Figure 6-28: Ethernet PCS/PMA Sublayer Extension UG194_6_28_080409 The PCS/PMA sublayer contains its own functional blocks, which are illustrated and summarized in the following subsections. TEMAC User Guide www.xilinx.com 179 UG194 (v1.10) February 14, 2011 GTP/GTX Transceiver TX+ TX- RX+ RX- SGMII Link 10BASE-T 100BASE-T 1000BASE-T PHY PHY Link TX Copper Medium RX
Page 1 and 2:
Virtex-5 FPGA Embedded Tri-Mode Eth
Page 3 and 4:
Date Version Revision 08/08/07 (con
Page 5 and 6:
Date Version Revision 10/01/09 1.9
Page 7 and 8:
Table of Contents Guide Contents .
Page 9 and 10:
R Chapter 5: MDIO Interface Introdu
Page 11 and 12:
R About This Guide Guide Contents P
Page 13 and 14:
R Additional Support Resources User
Page 15 and 16:
R Typographical Online Document Use
Page 17 and 18:
Introduction Key Features R Chapter
Page 19 and 20:
R Typical Ethernet Application Over
Page 21 and 22:
R Number of Bytes Physical Sublayer
Page 23 and 24:
R Data Pad FCS Ethernet Protocol Ov
Page 25 and 26:
R Using the Embedded Ethernet MAC T
Page 27 and 28:
R Ethernet MAC Overview Chapter 2 T
Page 29 and 30:
Generic Host Bus DCR Bus R Flow Con
Page 31 and 32:
R Ethernet MAC Primitive Ethernet M
Page 33 and 34:
R Ethernet MAC Signal Descriptions
Page 35 and 36:
R Table 2-3: Receive Client Interfa
Page 37 and 38:
R DCR Bus Signals Table 2-6: DCR Bu
Page 39 and 40:
R Table 2-8: PHY Data and Control S
Page 41 and 42:
R Table 2-12: PCS/PMA Signals Table
Page 43 and 44:
R Table 2-16: Mode Configuration At
Page 45 and 46:
R Table 2-17: MAC Configuration Att
Page 47 and 48:
R Table 2-17: MAC Configuration Att
Page 49 and 50:
R Table 2-18: Physical Interface At
Page 51 and 52:
R Client Interface Chapter 3 This c
Page 53 and 54:
R Normal Frame Transmission CLIENTE
Page 55 and 56:
R CLIENTEMAC#TXCLIENTCLKIN CLIENTEM
Page 57 and 58:
R CLIENTEMAC#TXCLIENTCLKIN CLIENTEM
Page 59 and 60:
R Normal Frame Transmission PHYEMAC
Page 61 and 62:
R CLIENTEMAC#TXCLIENTCLKIN PHYEMAC#
Page 63 and 64:
R CLIENTEMAC#TXCLIENTCLKIN PHYEMAC#
Page 65 and 66:
R Frame Reception with Errors CLIEN
Page 67 and 68:
R Receive (RX) Client: 8-Bit Interf
Page 69 and 70:
R Receive (RX) Client: 16-Bit Inter
Page 71 and 72:
R Address Filtering Address Filteri
Page 73 and 74:
R CLIENTEMAC#RXCLIENTCLKIN Flow Con
Page 75 and 76:
R Transmitting a PAUSE Control Fram
Page 77 and 78:
R Operation Figure 3-30 illustrates
Page 79 and 80:
R Ethernet MAC Block EMAC#CLIENTTXS
Page 81 and 82:
R Table 3-3: Bit Definitions for th
Page 83 and 84:
R CLIENTEMAC#RXCLIENTCLKIN EMAC#CLI
Page 85 and 86:
R Host/DCR Bus Interfaces This chap
Page 87 and 88:
HOSTCLK HOSTMIIMSEL HOSTREQ HOSTOPC
Page 89 and 90:
R Table 4-3: Receiver Configuration
Page 91 and 92:
R Table 4-5: Flow Control Configura
Page 93 and 94:
R Table 4-7: RGMII/SGMII Configurat
Page 95 and 96:
R Table 4-9: Unicast Address (Word
Page 97 and 98:
R Table 4-13: Address Filter Mode 0
Page 99 and 100:
R HOSTCLK HOSTMIIMSEL HOSTOPCODE[1]
Page 101 and 102:
R HOSTCLK HOSTMIIMSEL HOSTREQ HOSTO
Page 103 and 104:
R Using the DCR Bus The directly ad
Page 105 and 106:
R Table 4-18: DCR Control Register
Page 107 and 108:
R Using the DCR Bus The IRENABLE_e#
Page 109 and 110:
R // Write to the cntlReg_e1 regist
Page 111 and 112:
DCR Offset 0x1 MSB R Using the DCR
Page 113 and 114:
R Using the DCR Bus // EMAC Managem
Page 115 and 116:
R MDIO Interface Chapter 5 This cha
Page 117 and 118:
MDC MDIO R MDIO Transactions Introd
Page 119 and 120:
R MDIO Implementation in the Ethern
Page 121 and 122:
Generic Host Bus DCR Bus R PHYEMAC#
Page 123 and 124:
R 1000BASE-X PCS/PMA Management Reg
Page 125 and 126:
R Table 5-4: Status Register (Regis
Page 127 and 128: R 1000BASE-X PCS/PMA Management Reg
Page 129 and 130: R Table 5-13: Vendor-Specific Regis
Page 131 and 132: R 2, 3 “PHY Identifier (Registers
Page 133 and 134: 1.2 SGMII Link Status R Table 5-16:
Page 135 and 136: R Table 5-22: SGMII Auto-Negotiatio
Page 137 and 138: R Physical Interface Chapter 6 This
Page 139 and 140: R GMII / MII RGMII SGMII Introducti
Page 141 and 142: TX CLIENT LOGIC RX CLIENT LOGIC R M
Page 143 and 144: R Gigabit Media Independent Interfa
Page 145 and 146: GTX_CLK R IBUFG TX CLIENT LOGIC RX
Page 147 and 148: GTX_CLK R IBUFG BUFG TX Client Logi
Page 153 and 154: R Reduced Gigabit Media Independent
Page 157 and 158: GTX_CLK TX Client Logic RX Client L
Page 159 and 160: GTX_CLK TX Client Logic RX Client L
Page 165 and 166: FPGA R PCS/PMA Sublayer MAC TX Inte
Page 167 and 168: R Ethernet MAC to RocketIO Serial T
Page 169 and 170: TX and RX Client Logic R 1000BASE-X
Page 171 and 172: R 1000BASE-X PCS/PMA REFCLKOUT outp
Page 173 and 174: R DCM BUFG CLKFB CLK0 CLKIN CLKFX B
Page 175 and 176: R 1000BASE-X PCS/PMA IEEE Std 802.3
Page 177: R 1000BASE-X PCS/PMA Ethernet MAC.
Page 181 and 182: R RX Elastic Buffer Implementations
Page 183 and 184: R Serial Gigabit Media Independent
Page 189 and 190: R Ethernet MAC (PCS/PMA Sublayer) E
Page 191 and 192: TX and RX Client Logic R SGMII Cloc
Page 195 and 196: DCM CLKFB CLK0 CLKIN CLKDV CLKDV_DI
Page 199 and 200: R Interfacing to a Statistics Block
Page 201 and 202: R Using the DCR Bus to Access Stati
Page 203 and 204: R Pinout Guidelines Appendix A Xili
Page 205 and 206: R Ethernet MAC Clocks Appendix B Th
Page 207 and 208: TX Client Logic RX Client Logic R
Page 209 and 210: R Clock Enables Clock Connections t
Page 211 and 212: R Receiver Clock Clock Definitions
Page 213 and 214: R GMII (Byte PHY) Mode Clock Defini
Page 215 and 216: R Clock Definitions and Frequencies
Page 217 and 218: R Virtex-4 to Virtex-5 FPGA Enhance
Page 219 and 220: R Clock Enables Modifications Relat
Page 221 and 222: R Additional Attributes Table C-2:
Page 223 and 224: R Appendix D Differences between So
show all

Xilinx UG194 Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?