Black Box IC026A-R2, IC026AE-R2 Selecting the Mode, Switch SW3 Selecting the Ieee Bus Terminator

RS-232↔IEEE 488 INTERFACE CONVERTER

3.4.2IEEE BUS TERMINATOR

SW3-6 through SW3-8 set the IEEE bus terminators used for data sent or received by the interface converter. EOI, a line used to signal the end of a multiple character bus transfer, may also be enabled. If enabled, EOI is asserted when the last selected bus terminator is sent. Factory default is LF Only with EOI disabled.

1 2 3 4 5 6 7 8

OPEN

CR Only

1 2 3 4 5 6 7 8

OPEN

LF Only

1 2 3 4 5 6 7 8

OPEN

EOI Disabled

1 2 3 4 5 6 7 8

OPEN

LF-CR

1 2 3 4 5 6 7 8

OPEN

CR-LF

1 2 3 4 5 6 7 8

OPEN

EOI Enabled

Switch

Side

View

DOT

Figure 3-9. Switch SW3: Selecting the IEEE Bus Terminator.

3.5 Selecting the Mode

SW2-1 sets the major operating mode of the interface converter. The IEEE Controller (RS-232-to-IEEE converter) mode allows a serial host device to send data to a single IEEE bus peripheral. Applications include interfacing a listen-only or addressable IEEE printer/plotter to a serial printer port. Refer to Chapter 4 for more detailed information on the controller mode of operation.

The Peripheral mode is used when interfacing a serial device to an IEEE controller. Data which is sent by the IEEE controller to the interface converter is transmitted out its serial port. Data received from the serial device is buffered by the interface converter until read by the IEEE controller. Refer to Chapter 5 for more detailed information on the peripheral mode of operation.

The factory default is the IEEE Controller mode, an RS-232-to-IEEE converter.

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