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PCI-DAS64/M2/16 User's Guide Specifications
Interrupts
Table 14. Interrupt specifications
Interrupts PCI INTA# - Mapped to IRQn via PCI BIOS at boot-time
Interrupt enable Programmable through PLX9080
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.
ADC interrupt
DAQ_EOSEQ: Interrupt is generated after each interval delay during multi-
channel scans.
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.
DAC interrupt sources
(software-programmable)
DAC_RETRANSMIT: Interrupt is generated when the end of a waveform sequence
has occurred in retransmit mode.
External interrupt
Interrupt is generated via edge-sensitive transition on the External Interrupt pin.
Rising/falling edge polarity software selectable.
Counters
Table 15. Counter specifications
User counter type 82C54
Configuration One down counter, 16-bits. Counters 2 and 3 not used.
Counter 1 source External, from connector (CTR1 CLK)
Counter 1 gate Available at connector (CTR1 GATE).
Counter 1 output Available at connector (CTR1 OUT).
Clock input frequency 10 MHz max
High pulse width
(clock input)
30 nS min
Low pulse width
(clock input)
50 nS min
Gate width high 50 nS min
Gate width low 50 nS min
Input low voltage 0.8 V max
Input high voltage 2.0 V min
Output low voltage 0.4 V max
Output high voltage 3.0 V min
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