Address Register 0 (Adr0) - National Instruments Corporation GPIB-1014P User Manual

Register Descriptions

Address Register 0 (ADR0)

VMEbus Address:
Attributes:
7 6
X DT0
ADR0 reflects the internal GPIB address status of the TLC as configured using the ADMR. In
addressing Mode 2, ADR0 indicates the address and enable bits for the primary GPIB address of
the TLC. In dual primary addressing (Modes 1 and 3) ADR0 indicates the TLC major primary
GPIB address. (Refer to description of ADMR for information on addressing modes).
Bit Mnemonic
7r X
6r DT0
5r DL0
4-0r AD5-0
through
AD1-0
GPIB-1014P User Manual
Base Address + D (hex)
Read Only
5 4
DL0 AD5-0
Description
Don't Care Bit
Reads as a zero or one.
Disable Talker 0
If DT0 is set it indicates that the mode 2 primary (or mode 1 and 3
major) Talker is not enabled; that is, the TLC does not respond to a GPIB
talk address matching AD[5-0–1-0]. If DT0=0, the TLC responds to a
GPIB talk address matching bits AD[5-0–1-0].
Disable Listener 0 Bit
If DL0 is set, it indicates that the mode 2 primary (or mode 1 and 3
major) Listener is not enabled; that is, the TLC does not respond to a
GPIB Listen address matching bits AD[5-0–1-0]. If DL0=0, the TLC
responds to a GPIB listen address matching bits AD[5-0–1-0].
Mode 2 Primary GPIB Address Bits 5-0 through 1-0
These are the lower five bits of the TLC GPIB primary (or major)
address. (The primary talk address is formed by adding octal 100 to
AD5-0 through AD1-0, while the listen address is formed by adding
octal 40.)
4-44
3 2
AD4-0 AD3-0
© National Instruments Corporation
Section Four
1 0
R
AD2-0 AD1-0