EV-2 datasheet(9/44 Pages) CIRRUS

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CobraNet™ EV-2

Rev. 2.1

SW200

Programming switch: The EV-2 microcontroller can be programmed via its serial port,

connector P501. The supplied software can be used to perform field updates to the board's

code and firmware. This programming capability is initially disabled, but can be enabled by

setting the hex switches to FFF8H and then clicking on the "Hex Switches" display (see

Figure 6 ). For more information about the programming mode, please refer to the

Programming the Microcontroller section.

SW201-SW204

Hex switches: SW201-SW204 may be used to uniquely identify the unit on a network. Valid

settings fall within the range 0000-FFEF (values FFF0-FFFF are reserved). Changing these

values updates the value of the CobraNet module's SNMP variable, sysName, to the current

hex switch value. Through SNMP, the user may query this variable. The SNMP response is of

the form "PEAK_AUDIO_EVAL-SWwxyz", where the wxyz represents the hex values of the

switches in ASCII format.

SW500

System reset switch: This momentary switch resets the EV-2 and attached CM, and initiates

calibration operations for the analog-to-digital converter (ADC) and digital-to-analog

converter (DAC).

Software

The EV-2 is supplied with the CNEval.exe application, which may be used to setup audio routes

on the EV-2 (this should not be confused with routing audio over the CobraNet network). The

EV-2 has seven sources of audio input, with each source consisting of a stereo pair of audio

channels. The sources are:

•

Four Synchronous Serial Interface (SSI) audio streams from the CM

•

An AES3 audio input stream.

•

One audio stream from the ADC (Rev. D boards had two audio streams from the ADC)

•

A sine wave generator, a stream of two identical 24-bit resolution sine waves.

Using CNEval.exe, the user can route any of these seven source streams to any of the six output

streams. The available output streams are:

•

The four SSI audio streams going to the CM

•

One going to the DAC

•

One to the AES3 transmitter.

CNEval.exe communicates with the EV-2 via an RS-232 serial connection. CNEval.exe can

communicate using either COM1 or COM2 of the PC on which it is running. The connection from

computer to EV-2 must be made as follows:

•

Connect a straight-through, male-to-female, 9-pin RS232 cable to EV-2 connector P501.

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