Functional details, Pci-int32 block diagram, Dio signals – Measurement Computing PCI-INT32 User Manual

Page 11: Functional details -1, Pci-int32 block diagram -1, Dio signals -1

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Chapter 4

Functional Details

PCI-INT32 block diagram

PCI-DIO96 functions are illustrated in the block diagram shown here.

Figure 4-1. PCI-INT32 functional block diagram

DIO signals

All digital outputs and inputs on the PCI-INT32 connector are TTL (Transistor-Transistor-Logic). TTL is an
electronics industry term which describes a standard for digital signals which are either at 0 V or 5 V (nominal).

Under normal operating conditions, the voltages on the Z8536 pins range from near 0 volts for the low state to
near 5.0 volts for the high state. The current handling capability of these inputs / outputs is limited to a few
milliamps. This is typical of TTL devices.

4-1