Omega Engineering DIGITAL INPUT/OUTPUT PCI-DIO96 - Manual (Page 21)

6 SPECIFICATIONS
Power Consumption
150 mA max +5V
Digital Input / Output
User installed. Dual footprint allows pull-up
or pull-down configuration Pull-Up/Pull-Down Resistors
Input mode (high impedance) Power-up / reset state
0.8 volts max,
−
0.5 volts absolute min Input Low
2.0 volts min, 5.5 volts absolute max Input High
0.4 volts max @ 2.5mA Output Low
3.0 volts min @
−
2.5mA Output High
•
2 banks of 8 and 2 banks of 4, or
•
3 banks of 8, or
2 banks of 8 with handshake
Configuration per 82C55
96 Number of I/O
Four 82C55 Digital Type
Counter Section
Output:
Gate
Source: Counter 3 - Not used
Output: Selectable Interrupt source
Gate: Tied to +5V
Source: Counter 1 OUT Counter 2
Output: Selectable Interrupt source
Gate: Tied to +5V
Source: 2 MHz (crystal osc./8) Counter 1
3 counters, 16 bits each Configuration
82C54 Counter type
18