Agilent Technologies E5052A Programmer's Manual page 494

Communication with External Instruments Using 24-bit I/O Port
24-bit I/O Port Overview
24-bit I/O Port Overview
The E5052A 24-bit I/O port provides four independent parallel ports for data I/O
associated with several control signal lines and the power line. All signals operate in TTL
logic.
The data I/O ports are configured with 2 pairs of 8-bit output ports and 2 pairs of 4-bit
bi-directional ports. Furthermore, these ports can cooperate to provide a maximum
16-bit-wide output port or a maximum 8-bit-wide input port.
The I/O signals operate on a negative logic basis. The control signal lines consist of various
control output data, including completion of measurement or control signal for
handshaking. Figure C-1 outlines the I/O ports and control signal lines.
Figure C-1 24-bit I/O port outline
C
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