Auxiliary Mode Register (Auxmr) - National Instruments Corporation GPIB-1014P User Manual

Register Bit Descriptions

Auxiliary Mode Register (AUXMR)

VMEbus Address:
Attributes:
7 6
CNT2 CNT1
The AUXMR is used to issue auxiliary commands. It is also used to program the five hidden
registers:
• Auxiliary Register A (AUXRA)
• Auxiliary Register B (AUXRB)
• Parallel Poll Register (PPR)
• Auxiliary Register E (AUXRE)
• Internal Counter Register (ICR)
Table 4-2 shows the control and command codes used.
Bit Mnemonic
7-5w CNT[2-0]
GPIB-1014P User Manual
Base Address + B (hex)
Write Only,
Permits Access to Hidden Registers
5 4
CNT0 COM4
Description
Control Code Bits 2 through 0
These bits specify the control code (that is, the manner in which the
information in bits COM[4-0] is to be used). If CNT[2-0] are all zero,
then the special command selected by COM[4-0] is executed; otherwise,
the hidden register selected by CNT[2-0] is loaded with the data from
COM[4-0].
3 2
COM3 COM2
4-28 © National Instruments Corporation
Section Four
1
0
COM1 COM0
W