Measurement-computing PCI-DAS6023 Bedienungsanleitung PDF herunterladen (Seite 36)

PCI-DAS6023 and PCI-DAS6025 User's Guide Specifications

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.

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