PCI-DAS1602/16 User's Guide
Functional Details
17
Analog outputs
The two high-speed 16-bit dual analog outputs are updated via an on-board FIFO and REP OUTSW
commands, and provide a 100 kHz maximum update rate. Output ranges are individually configurable with
software for ±10 V and ±5 V, 0 to 10 V and 0 to 5 V. The D/A outputs provide rated accuracy to ±5 mA, and
are short circuit protected (25 mA limit). The analog outputs are cleared to 0 V on power up or reset.
Parallel digital I/O
The 24 bits of TTL-compatible, high-current (64 mA sink, 15 mA source) digital I/O are available as two eight-
bit ports and two four-bit ports. This digital capability is an 82C55 mode 0 chip emulation, which allows each
port to be configured independently as either input or output. The digital I/O ports default to the input state
(high impedance) on power up or reset.
Counter/timer I/O
The PCI-DAS1602/16 provides two counter 82C54 counter chips. Each chip contains three 16-bit down
counters that provide clock, gate, and output connections. You can connect the counter clock to the on-board
10 MHz crystal oscillator, or leave unconnected for user input.
