The General Standards PCI-HPDI32A-1M is a high-speed parallel digital I/O PCI board engineered for demanding data acquisition and real-time control applications. It delivers 32 channels of differential I/O with configurable transceiver technology—RS422/485, PECL, or LVDS—enabling flexible integration into industrial automation, laboratory instrumentation, and embedded systems. The board combines a high-performance PCI-DMA engine with deep FIFO buffering to sustain continuous data flow independent of host CPU intervention, making it ideal for applications requiring deterministic, uninterrupted I/O streaming.
## Technical Specifications
• **Form Factor:** PCI (PCI Specification 2.1 / PCI v2.2 64-bit, 66 MHz compliant)
• **Data Width:** 32 bits
• **PCI Bus Transfer Rate:** Up to 132 Mbytes/second (burst mode)
• **Cable I/O Transfer Rates:**
– RS422/485: 80 Mbytes/second maximum
– PECL: 200 Mbytes/second
– LVDS (selected models): 200 Mbytes/second
• **Clock Rates:**
– RS422/485: Up to 20 MHz
– PECL: Up to 50 MHz
• **Sample Rate:** 20 MHz (standard); 25 MHz/100 Mbytes/second (RS422/485 or PECL)
• **FIFO Buffering:** Up to 512 Kbytes per channel; 1 Mbyte total capacity across eight FIFOs (four transmit, four receive)
• **DMA Engine:** PLX-based PCI-DMA with D32 block transfers, DMA chaining, and <1 microsecond start latency
## Key Features
• Eight independent FIFOs with programmable Almost Empty and Almost Full thresholds
• Differential transceiver options with noise immunity and surge protection
• RS422/485 transceivers: ±7.5 V noise immunity, ±25 V transient withstand
• PECL transceivers: High-output drivers for 50 Ω loads
• LVDS transceivers: ±140–360 mV differential voltage, ±100 mV receiver threshold
• On-board parallel termination (150 Ω, removable for multidrop)
• Plug-and-play PCI initialization
## Typical Applications
• High-speed parallel data acquisition
• Industrial process control and monitoring
• Test and measurement instrumentation
• Real-time embedded I/O systems
• Cable-based remote digital interfacing
## Compatibility & Integration
Plug-and-play PCI enumeration ensures rapid system integration. Configurable transceiver technology accommodates legacy RS422/485 installations, high-speed PECL systems, and low-power LVDS designs. Supports D32 DMA transfers and chaining for efficient host-independent data movement.
