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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.

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