Black Box IC026A-R2 manual Serial-Poll Status-Byte Register, DIO8 Ieee Input Buffer not Empty

RS-232↔IEEE 488 INTERFACE CONVERTER

1 2 3 4 5 6 7 8

OPEN

SRQ on Last

Terminator Disabled

1 2 3 4 5 6 7 8

OPEN

SRQ on Last

Terminator Enabled

Switch

Side

View

DOT

Figure 5-1. Switch SW1: Enabling or Disabling

“SRQ on Last Terminator.”

5.4 Serial-Poll Status-Byte Register

The following shows and describes the serial-poll status information provided by the interface converter.

DIO8 IEEE Input Buffer NOT Empty

This bit is set when the IEEE input buffer contains one or more data bytes.

128 64 32 16 8 4 2 1

DIO8

DIO7 DIO6

DIO5 DIO4 DIO3 DIO2 DIO1

IEEE Input Buffer Not Empty Request Service—rsv bit Not Used—Always "0" Serial Input Buffer Not Empty IEEE Input Buffer Full Last Serial Input Terminator Serial Handshake Not Used—Always "0"

Figure 5-2. Serial Poll Status Byte.

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