Keysight / Agilent / HP E2074 GPIO/EISA Interface Card

The Keysight/Agilent/HP E2074 is an EISA and GPIO interface card that enables connection of external devices lacking standard interface protocols such as HP-IB or RS-232. The card supports 16-bit data exchange and operates as an EISA/ISA expansion slot card for HP Series 700 workstations and PCs. Two operational modes provide flexibility: Compatibility Mode emulates the HP 98622 GPIO interface, while Enhanced Mode delivers a bi-directional data port with auxiliary control lines for expanded I/O capability.

## Technical Specifications

• **Data Exchange:** 16-bit capability
• **Interface Type:** GPIO/EISA Bus
• **I/O Base Address:** Configurable via DIP switch (factory default: hexadecimal 228); Switches 1, 2, and 3 determine address selection; Switch 4 unused
• **Data-In Clocking:** Three selectable settings
• **Physical Weight:** 3 lbs per unit

## Key Features

• **Dual Operating Modes:** Compatibility Mode for legacy HP 98622 emulation; Enhanced Mode with auxiliary control lines
• **Connection Flexibility:** Configurable handshake methods, multiple data-latching options, and selectable data width and polarity
• **Auxiliary Status and Control Lines:** Extended control capability beyond base GPIO functionality
• **Address Configuration:** DIP switch-selectable I/O base address with conflict avoidance for multi-interface installations

## Typical Applications

Data acquisition and control systems requiring connection to external devices without inherent protocol support. The card accommodates applications needing flexible handshaking, variable data widths, and custom control signaling.

## Compatibility & Integration

• **Operating Systems:** HP-UX versions 9.x and 10.x on Series 700 workstations; Microsoft Windows 95 or Windows NT on PCs
• **Hardware Requirements:** EISA/ISA expansion slot
• **Installation:** Standard card installation into expansion slot with DIP switch configuration of I/O base address prior to deployment