ezLINX™

Hardware User

Guide

i

Coupler® Isolated Interface Development

Environment

Rev. PrA | Page 3 of 15

SYSTEM ARCHITECTURE

The system architecture Block diagram of the ezLINX hardware

is shown in Figure 2. An extender connector, Hirose FX8 120P-

SV(91), is added for additional functionality. The Ethernet

option is not fitted on the standard ezLINX hardware.

Figure 2. ezLINX Hardware Block diagram

ISOLATED CAN

The Isolated CAN port is implemented using the ADM3053

Signal and Power isolated CAN transceiver. The ADM3053

connects to CAN0 of the ADSP-BF548 and is capable of

functioning at data rates of up to 1Mbit/s. Figure 3 shows a

circuit diagram of the implementation of the ADM3053 on the

ez

LINX hardware.

The CAN Node can be configured using jumpers JP17 and

JP18. When both jumpers JP17 and JP18 is fitted, the CAN

node is split terminated with 120Ω and a common mode

capacitor o f 47nF. If termination is not required, remove JP17

and JP18. Table x show jumper configurations for all the

interfaces on ezLINX.

iso

Power isolated Power supply of the ADM3053. This

generates an isolated 5V on the Visoout pin(pin 12) of the

ADM3053 and needs to is connected to the Visoin pin(pin 19).

i

Coupler signal isolation that needs to be compatible with the

3.3V logic of the Blackfin ADSP-BF548. The RS pin(pin 18) is

connected through a 0Ω resistor to CAN_ISO_GND in order to

de-activate slew rate limiting,

A four pin screw terminal connector, J8 is used for easy access

to the CANH(Pin 1), CANL(Pin 3) and CAN_ISO_GND(Pin 2

and 4) connections.

Application note AN-1123 provides more information on

implementing CAN Nodes.