ADIN3310BBCZ datasheet(79/86 Pages) AD

79 / 86 page

Data Sheet

ADIN3310/ADIN6310

APPLICATIONS INFORMATION

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Rev. A | 79 of 86

Cascading Multiple Switches

Larger port counts can be built by cascading multiple switches

as shown in Figure 62. The host processor manages the switch

configuration and is connected via the SPI to the primary switch

in the chain. Two ports of the primary device can be used for

trunk connections to the Ethernet network, and one port as an

interconnection to the chain of secondary switches. The intercon-

nect is either RGMII or SGMII, with SGMII preferred due to the

reduced number of traces required and its capability to route over

longer traces and across connectors. The EVAL-ADIN6310T1LEBZ

version of hardware exposes the SGMII differential pairs through

SMA connectors to enable cascading of switches for evaluation

purposes. When cascading using this interface, options to configure

the switch with 1000BASE-KX, 100BASE-FX, or SGMII mode of

operation. If using SGMII mode and connecting directly to anoth-

er ADIN6310 device, configure both sides to match and disable

autonegotiation for that port. The interconnect consumes two ports

on each secondary switch device, leaving four ports available to

connect to the ADIN1100 10BASE-T1L PHYs per switch; therefore,

each additional switch adds four spur ports to the system.

Figure 62. Cascading Multiple Switches to Build a Larger Field Switch

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