Measurement Computing PCI-DAS6023 - Manual (Page 36)

PCI-DAS6023 and PCI-DAS6025 User's Guide Specifications
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82C55 (PCI-DAS6025 only)
Table 16. 82C55 specifications (PCI-DAS6025)
Digital type 82C55
Number of I/O 24 (FIRSTPORTA 0 through FIRSTPORTC 7)
Configuration 2 banks of 8 and 2 banks of 4 or
3 banks of 8 or
2 banks of 8 with handshake
Pull up/pull-down configuration All pins pulled up to +5 V via 47 K resistors (default). Positions available for
pull-down to ground (factory configured option).
Input high voltage 2.0 V min, 5.5 V absolute max
Input low voltage 0.8 V max, –0.5 V absolute min
Output high voltage (IOH = -2.5 mA) 3.0 V min
Output low voltage (IOL = 2.5 mA) 0.4 V max
Power-up / reset state Input mode (high impedance)
Interrupts
Table 17. Interrupt specifications
Interrupts PCI INTA# - mapped to IRQn via PCI BIOS at boot-time
Interrupt enable Programmable through PLX9080
ADC Interrupt sources
(software programmable) DAQ_ACTIVE: Interrupt is generated when a DAQ sequence is active.
DAQ_STOP: Interrupt is generated when A/D Stop Trigger In is
detected.
DAQ_DONE: Interrupt is generated when a DAQ sequence completes.
DAQ_FIFO_1/4_FULL: Interrupt is generated when ADC FIFO is ¼ full.
DAQ_SINGLE: Interrupt is generated after each conversion completes.
DAQ_EOSCAN: Interrupt is generated after the last channel is converted in
multi-channel scans.
DAQ_EOSEQ: Interrupt is generated after each interval delay during
multi-channel scans.
DAC Interrupt sources
(software programmable) DAC_ACTIVE: Interrupt is generated when DAC waveform circuitry is
active.
DAC_DONE: Interrupt is generated when a DAC sequence completes.
DAC_FIFO_1/4_EMPTY: Interrupt is generated DAC FIFO is ¼ empty.
DAC_HIGH_CHANNEL: Interrupt is generated when the DAC high channel output
is updated.