Black Box IC026A-R2 Manual De Usuario
48
RS-232
↔IEEE 488 INTERFACE CONVERTER
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.
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.
or more data bytes.
Figure 5-2. Serial Poll Status Byte.
DIO8
DIO7
DIO6
DIO5
DIO4
DIO3
DIO2
DIO1
128
64
32
16
8
4
2
1
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 T
erminator
Serial Handshake
Not Used—Always "0"
Switch
Side
View
DOT
1 2 3 4 5 6 7 8
OPEN
SRQ on Last
Terminator Enabled
1 2 3 4 5 6 7 8
OPEN
SRQ on Last
Terminator Disabled