I N T R O D U C T I O N; G E N E R A Ldescription - Racal Instruments 7064 Instruction Manual

SECTION 1

1.1 I N T R O D U C T I O N

This manual contains information on how to install and operate the 7064 in a VXlbus
environment. I t describes the function of the 7064 under control by the 96 buffered I/O
lines, or via the 68000 bus lines.
1.2 G E N E R A L DESCRIPTION
The 7064 is a message-based development module made up of a removable message-
based interface, and a breadboard card consisting of seventy square inches of breadboard
area for prototyping and development of digital and analog circuits.
The user circuitry developed on the breadboard can be controlled either by the twelve
8-bit individually configurable ports, or via the 68000's bus directly. The upper half of
the 68000 address space is available on the Message-Based Interface module for user
development.
The breadboard area is the front two-thirds of the module, and consists of two separate
arrays with holes on .1 inch centers. The arrays are divided into group A and group B
areas. E a c h area is subdivided into lettered columns and numbered rows for user
convenience. There are two uncommitted power distribution grids in each array available
to the user. These grid planes may be connected to various power supplies provided by
the VXI backplane. These two layers are called "Top" and "Bot" (Bottom). There are
also two power planes dedicated to +5V and ground.
One Message-Based Interface module can control up to twelve breadboard cards via the
local bus (see VXlbus Revision 1.3 specs for definition), allowing one to design multiple
module VXlbus instruments using a single interface board. The Message-Based Interface
module must be installed on the left-most breadboard card.
G E N E R A L DESCRIPTION
1-1