Measurement-computing PCI-DAS1602/16 Manuel d'utilisateur télécharger pdf (Page 25)

PCI-DAS1602/16 User's Guide Specifications

Digital input / output

Table 9. Digital input/output specifications

Digital type

82C55 emulation

Input 74LS244

Output 74LS373

Number of I/O

Configuration

2 banks of 8 and 2 banks of 4, or

3 banks of 8, or

2 banks of 8 with handshake

Input high

2.0 volts min, 7 volts absolute max

Input low

0.8 volts max, -0.5 volts absolute min

Output high

2.4 volts min @ -15 mA

Output low

0.5 volts max @ 64 mA

Power-up / reset state

Input mode (high impedance)

Pull-up/pull-down resistors

Provisions have been made on the board for user installed pull-up/pull-

down resistor networks

Simultaneous sample and hold trigger

TTL output (SSH OUT).

Logic 0 = Hold

Logic 1 = Sample compatible with CIO-SSH16

Interrupts

Table 10. Interrupt specifications

Interrupt

INTA# - mapped to IRQn via PCI BIOS at boot-time

Interrupt enable

Programmable through PLX9052

Interrupt polarity

Active high level or active low level, programmable through PLX9052

Interrupt sources

(software programmable)

External (rising TTL edge event)

Residual counter

A/D End-of-conversion

A/D End-of-channel-scan

A/D FIFO-not-empty

A/D FIFO-half-full

D/A FIFO-not-empty

D/A FIFO-half-full

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 31

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