ADIN3310BBCZ datasheet(76/86 Pages) AD

76 / 86 page

Data Sheet

ADIN3310/ADIN6310

APPLICATIONS INFORMATION

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Rev. A | 76 of 86

APPLICATION USE CASES

6-Port Configuration

The ADIN6310 is designed for use in programmable logic controller

(PLC), distributed control system (DCS), or remote input and output

units where it provides scalable port counts to enable connection of

external devices within the automation environment. The first use

case for the ADIN6310, shown in Figure 59, illustrates a 6-port

switch configuration where the host processor interfaces with the

ADIN6310 through the SPI (standard SPI, dual SPI, or quad SPI)

only to enable all six ports to be used for connection to external

devices.

The Ethernet PHYs can be a mix of different speed PHYs using

the ADIN1300 10 Mbps, 100 Mbps, and 1000 Mbps and ADIN1200

10 Mbps and 100 Mbps devices. The interface shown between

the ADIN6310 and ADIN1200 is RGMII, but it could also be RMII;

however, RGMII is preferred because of latency, ease of PHY

addressing, and simplification of the clocking requirement (because

the voltage domain between the ADIN6310 and ADIN1200 can

differ).

Similarly, the 6-port switch can be configured to provide four ex-

ternal ports connecting to factory cells, human machine interface

(HMI), robots, vision systems, or other inputs, and the remaining

two ports can be used for internal connection to the PLC backplane

with one Ethernet connection to the host processor via RGMII.

Figure 59 also shows the host interface residing on the optional

separate VDDIO_A voltage domain, which includes Port 0, the SPI,

timers, and GPIO. The PHYs on Port 2 through Port 5 reside on

the VDDIO_B voltage domain and can run from a different voltage

than VDDIO_A. If a PHY is used on Port 0, this also resides on

the VDDIO_A voltage domain; therefore, some level shifting may be

required.

The supply voltage requirements for the switch can be satisfied

by using the LTM4668A module, which provides four voltage rails.

There are two common voltage rails (VDDIO and AVDD3P3) be-

tween the ADIN6310 and the ADIN1300 PHYs; however, the PHY

requires an additional 0.9 V rail, and the switch also requires a 1.1

V rail.

Figure 59. Application Circuit for 6-Port Switch Use Case Where the Host Processor Interface Is via SPI

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