Kontron SMARC-sAL28, Руководство пользователя

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SMARC-sAL28 User Guide. Rev. 1.0
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5.12. Ethernet Interfaces
Depending on the network configuration, up to two native 1000BaseT Ethernet with AR8031 PHYs (GBE0 and GBE1)
are available.
Additional network ports (connected to CPU internal switch) are possible with an external quad port PHY (QSGMII) at
the carrier.
There are 4 possible network variants
Table 18: Network variants
Variant GBE0 GBE1 Comment
1 RGMII -/- Available on customer request
no audio support
all PCIe combination possible
QSGMII on PCIE_D
2 SGMII Lane 0 SGMII LANE 1 Audio support
PCIe on PCIE_A and PCIE_B
no QSGMII on PCIE_D
3 SGMII Lane 0 -/- Audio support
PCIe on PCIE_A and PCIE_B
QSGMII on PCIE_D
4 SGMII Lane 0 RGMII No audio support
PCIe on PCIE_A and PCIE_B
QSGMII on PCIE_D
5.12.1. GBE0
The GBE0 PHY is available on each network variant.
Network variant 1 has the PHY to CPU connection with RGMII and MDIO address 0x4 (0b00100).
Network variants 2, 3 and 4 has the PHY to CPU connection with SGMII Lane 0 and MDIO address 0x5 (0b00101).
5.12.2. GBE1
The GBE1 PHY is available on network variant 2 and 4. Their PHY address in all cases is 0x4 (0b00100).
5.12.3. MDIO
There is one MDIO bus for all PHYs - on module PHYs and on carrier PHYs.
PHY addresses on module are 0x4 (0b00100) and 0x5 (0b00101) and cannot be used on carrier.
Table 19: MDIO Interfaces
SMARC
Connector LS1028A Comment
MDIO EMI1_MDIO 2k21 pull-up to 1.8V on module
MDC EMI1_MDC Decoupled with 1.8V 74LVD1G17 Schmitt trigger buffer
5.12.4. QSGMII
On network variant 1, 3 and 4 there is one QSGMII interface available at SMARC 2.0 connector port PCIE_D.
With a suitable carrier (e.g. KBOX A-230-LS) this interface allows 4 additional 1000Base-T network ports. These
ports connects the CPU with the CPU internal TSN capable switch.