i

Coupler® Isolated Interface

Development Environment

ezLINX™

Hardware User Guide

Rev. PrA | Page 6 of 15

ISOLATED RS-232

The Isolated RS-232 port is implemented using the ADM3252E

Signal and Power isolated RS-232 transceiver. The ADM3252E

connects to UART3 of the ADSP-BF548 and is capable of

functioning at data rates of up to 460kbit/s. Figure 6 shows a

circuit diagram of the implementation of the ADM3252E on the

ez

LINX hardware.

The Isolated RS-232 JP2 jumper when fitted will implement a

loopback of the transmitter output(TOUT1) to the receiver

input(RIN1).

technology.

A three pin screw terminal connector, J6 is used for easy access

to the TOUT1(pin 2), RIN1(pin 3) and RS232_ISO_GND(Pin

1) connections.

Figure 6. ADM3252E Isolated RS-232 Implementation

Isolator and ADuM5000 isoPower Isolated DC to DC converter.

The ADuM1250 connects to TW1 of the ADSP-BF548 and is

capable of functioning at a maximum frequency of 1MHz.

Figure 7 shows a circuit diagram of the implementation of the

ADuM1250 and ADuM5000 on the ezLINX hardware.

by 3.3V. The ADuM5000 will generate an isolated 3.3V and is

A three pin screw terminal connector, J22 is used for easy access

to the SDA(Pin 1), SCL(Pin 2) and I2C_ISO_GND(Pin 3)

connections.