Transtech Transputer, User Manual

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The TRAM Standard
TMB M 711 Transputer Motherboard User Manual
21
3.2.3 Electrical Description
The basic circuitry of a Transputer Module is shown in figure 20.
An explanation of the features of this circuit follows:
• Link inputs are protected from positive Electrostatic Discharge by
the inclusion of a signal diode taken to the positive supply rail. To
prevent unconnected link inputs floating a pull down resistor is
also included.
• Link outputs have a line resistance to match the output
impedance to that of the transmission line to which it is
connected.
• The NotError output is an inverted, buffered open collector
version of the transputer’s error flag.
Other connections require no special circuitry
3.3 The Transputer Module Motherboard
3.3.1 Overview
The module motherboard allows access to Transputer Modules from
a variety of host machines. The motherboard can usually be divided
into two distinct parts: the host specific interface part and the generic
TRAM part (although some motherboards do not have a host specific
interface).
The design goals of the motherboard standard were that the user
should be able to:
linksIn
linksOut
NotError
Figure 20. Basic TRAM circuit
transputer