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D-70 / Apr 2000
CPU & DSP
CPU Central Processor
DSP Digital Processor
Overview
Every D-70 console has a central controller and a digital signal
processor.
The D-70 Digital Audio console is provided with a serial interface port,
which is located on the DB-15 connector of the rear panel (see connection
diagrams for pinouts on the page 6-8). This serial interface is designed to
provide a number of functions including external control and set-up,
software updates, system interface, etc. Through this serial interface, the
D-70 control protocol is available, allowing visibility and control of the
console switches, displays, and other functions. The “Virtual Dip Switch”
application program (supplied with the D-70 console) communicates set
up information through this serial interface (see Chapter 7).
CPU
By monitoring the various console modules and serial ports, the CPU
controls all of the console audio and logic functions. Because the system
architecture is designed to work by communicating function and status
changes, the D-70 console is very responsive and fault tolerant.
The CPU has several functions and modes that can be configured by the
user. These are normally set to default values at the factory, and should not
be altered casually.
1. The first function is the console ID address. This function is set using
jumpers J29-J36, located on the Processing Board PR-70 PCB. This
address is used to identify the console serial interface port so that external
devices such as automation systems, the VDip software, and external
controllers will communicate with the console correctly. Because the
D-70 serial interface port can be configured as an RS-485 device, and
multiple consoles can be connected to the same RS-485 bus, each console
needs a unique address to identify it properly on the bus, ensuring that the
right commands get passed to the correct console. The specific address set
is unimportant except that any external controller must use a matching
D-70 / Aug 2000
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