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PCISC3
The PCISC3 Slave 3-Slot IP Module Carrier board is a PCI slave add-in board that supports three singlewide IPs, or one doublewide and one singlewide IP module. The PCISC3 supports 8 MHz IP transfers of ID, I/O, memory and interrupt acknowledge for all slots. The PCISC3 encompasses a design that does not insert IP module hold cycles, maximizing data throughput.
The PCISC3 provides up to 150 I/O points (50 per IP module) per PCI slot. LEDs on the PCISC3 provide diagnostic information on accesses to the IPs and to the PCISC3 local registers, and an IP acknowledgment signal. The PCISC3 has an easy-to-use flexible PCI interrupt capability where the individual interrupts from each IP module can be programmed to assert a common interrupt request to the PCI bus.
Application Features:
- Up to 150 I/O points in a single PCI (PC/AT) slot
- Performs I/O, ID, INT and MEM transfers on all IP modules with no HOLD cycles inserted
- PCISC3 registers and IP modules mapped into PCI memory space for easy access
- Board base addresses automatically configure by system BIOS at power-up
- Board is memory mapped via two apertures in the PCI bridge
- IP modules and carrier registers are memory mapped via one aperture in the PCI bridge
- Each of 6 IP module interrupt requests (2 per IP slot) can individually assert a PCI interrupt. The source of that interrupt can be determined by reading the contents of the Interrupt Steering Register
- Independent field replaceable fuses, and 'T' type filters are used for the +5, +12, and -12V power feeding each IP module
- Five IP/Carrier Access and IP module acknowledge indicators (with pulse stretchers)
- Resets individual IP modules via software
- Posts IP error signals as status
- Supports writes to ID space
- Three "standard" I/O ribbon-cable connections
- Supports three "strobe" connections (one per slot)
- Local time-out can be enabled for status/interrupt use
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