Measurement Computing PCI-INT32 - Manual (Page 14)

Chapter 5
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Power consumption
Table 1. Power consumption specifications
+5V operating 620 mA typical, 925 mA max
Counter/timer and parallel I/O
Table 2. Counter/timer and parallel I/O specifications
Device Zilog Z85C36 (2)
Output high 2.4 volts minimum @ -250 uA
Output low 0.5 volts maximum @ +3.2 mA
Input high 2.0 volts minimum, 7 volts absolute max
Input low 0.8 volts maximum, -0.3 volts absolute min
Power-up / reset state Input mode (high impedance)
Configured as digital input/output ports:
Digital configuration
4 banks of 8 (Ports A and B), 2 banks of 4 (Port C), programmable by bit or bank as
input or output
Number of channels 40 I/O
Configured as counter/timers: (Port A is a digital I/O port only)
Counter type
Zilog Z85C36
Counter configuration Six 16-bit counter/timers (Port B - High and Low nibble - and Port C)
All Trigger (C1-C3 TRIG), Source (C1-C3 IN), Gate (C1-C3 GATE), and Output (C1-
C3 OUT) for each chip are available at the user connector.
Clock input frequency 3 MHz max
High pulse width (clock input) 150 ns min
Low pulse width (clock input) 150 ns min
Trigger pulse width (high, low) 130 ns min
Interrupts
The Z8536 is programmable to generate interrupts based on bit change, pattern recognition, level or edge
triggered, whether configured as a digital I/O port or counter port. Refer to the ZILOG Z8036/Z8536 Product
Specification for further options. This document is available on our web site at
www.mccdaq.com/PDFmanuals/Z8536.pdf .
Table 3. Interrupt specifications
Interrupts INTA# - mapped to IRQn via PCI BIOS at boot-time
Interrupt enable Programmable (enabled by default) and external (INT ENABLE), active low
(pulled high through resistor).
Interrupt sources Programmable: 8536A interrupt output, 8536B interrupt output, 8536A OR'ed with
8536B, external (INT INPUT, active low) or None.
Interrupt output Buffered output for each chip available at user connector (INTA OUT, INTB OUT).
Interrupt priority Programmable: No priority or 8536A interrupt has priority over 8536B interrupt.
5-1