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Register Bit Descriptions Chapter 4
GPIB-1014 User Manual 4-4 © National Instruments Corporation
Interface Registers
Twenty-one GPIB Interface registers, eight of which are readable and 13 of which are writable,
are located within the NEC µPD7210 Talker/Listener/Controller (TLC) integrated circuit. Each
of the 21 interface registers is addressed relative to the GPIB-1014 VMEbus base address.
Figures 4-1 and 4-2 show the register and bit mnemonics of each TLC internal register, its
read/write accessibility, and its relative address. Figure 4-1 shows the regular GPIB-1014 GPIB
Interface registers. Figure 4-2 shows the hidden GPIB interface registers and illustrates the
method of writing to those registers via the Auxiliary Mode Register. Following Figures 4-1 and
4-2 are detailed function descriptions of all 21 interface registers.