ADLINK PCM-7248+ is a 48-bit parallel digital input/output (DIO) module for PC/104-Plus form factor. The header connectors are fully compatible with the industry opto-22 standard. The PCM-7248+ emulates mode 0 of industry standard 8255 Programmable Peripheral Interface (PPI) chips. Each PPI offers three 8-bit ports, Port A, Port B and Port C. The Port C is divided into 2 nibble-wide (4-bit) ports. The total 6 ports can be configured as input or output independently. The PCM-7248+ device has programmable timers/counters. One 16-bit counter is available for event counting, while the other 32-bit timer is available for timed interrupt generation. The PCM-7248+ device provides multiple programmable interrupt sources from DIO channels, as well as the output of the timer.

• PC/104-Plus specifications Rev. 1.2 compliant
• 48-CH TTL/DTL digital inputs/outputs
• Emulates 2 industry standard 8255 PPI (mode 0)
• Buffered circuits for higher driving capacity
• Direct interface with OPTO-22 compatible I/O modules
• Known power-up states
• Output port status read back
• 1-CH 32-bit timer for timed interrupt generation

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