
VMOD-2/VMOD-2D
12/15/97
Functional Description
Page 2 - 12Man. ID 03139, Rev. Index 0200
Some ID Bytes you may come across when interrogating your VMOD-2 for it's configuration
are:
As piggybacks are being continually added to the VMOD-2 range, we recommend you check
each employed VMOD/VMOD-2 piggyback's user manual for precise information regarding its
individual ID Byte assignment.
BITBUS is a registered Trademark of the Intel corporation
2.5 VMOD/VMOD-2 Connector Locations and Pin-outs
This section serves to give an overview of the piggyback interface connectors at both the
VMOD-2's VMEbus end and the VMOD-2's (piggyback's) external I/O. Figure 2.4 shows an
example configuration where two piggybacks are to be fitted to your VMOD-2, the first fits in
the upper position (Position A), and the second, is fitted in the lower (B) position. This section
commences with the two header type connectors (BU1a/BU1b and BU0a/BU0b) of the
VMOD-2 which directly interface to the selected piggyback's ST1 and (where 3-row/45-pin
interfaces are used) ST0 pin rows.
The lower case letters in the socket numbers refer to which piggyback location the connector
is used for, i.e. BU1a is socket 1 for piggyback location A. An illustration giving details of all
the VMOD-2's connectors is given below.
Table 2-6: ID Bytes
PB-BI T BITBUS™ Com munica tions pi ggyb ack
PB-DIO4 Digital I/O piggyback
PB-CNT Counter piggyback
PB-DAC D to A converter piggyback
PB-DAC-2 D to A converter piggyback
PB-DIO Digital I/O piggyback
PB-DIN Digital Input piggyback
PB-ADC A to D converter piggyback
PB-CIO Counter/I/O piggyback
PB-SIO4 Quad serial piggyback
PB-DOUT Digit al Output pigg yback
PB-DIN2 Digital Input piggyback
PB-DIO-2 Digital I/O piggyback
PB-REL Octo-Relay piggyback
PB-DIO-3 Digital I/O piggyback
PB-STP Digital I/O piggyback
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