Measurement Computing PCI-DIO96 - Manual (Page 18)

18
Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Power consumption
Table 1. Power consumption specifications
+5V quiescent 150 mA max
Digital input/output
Table 2. Digital input/output specifications
Digital type Four 82C55
Number of I/O 96
Configuration per 82C55
 2 banks of 8 and 2 banks of 4 or
 3 banks of 8 or
 2 banks of 8 with handshake
Output high 3.0 volts min @ -2.5 mA
Output low 0.4 volts max @ 2.5 mA
Input high 2.0 volts min, 5.5 volts absolute max
Input low 0.8 volts max, -0.5 volts absolute min
Power-up / reset state Input mode (high impedance)
Pull-up/pull-down resistors User installed. Dual footprint allows pull-up or pull-down configuration
Counters
Table 3. Counters specifications
Counter type 82C54
Configuration 3 counters, 16 bits each
Counter 1 Source: 2 MHz (xtal /8)
Gate: Tied to +5V
Output: Selectable Interrupt source
Counter 2 Source: Counter 1 OUT
Gate: Tied to +5V
Output: Selectable interrupt source
Counter 3 - Not used Source
Gate
Output