Cirrus Logic EV2 - Manual (Page 4)

Rev. 2.1 4
CobraNet™ EV-2
Introduction
The EV-2 provides a means of evaluating the CM-1 or CM-2 CobraNet™ Modules and the Cirrus
Logic CobraNet Silicon Series of devices. In addition to evaluating the CM-1 or CM-2 (hereafter
collectively referred to as the CM except where differences between the CM-1 and CM-2 exist),
the user may also use the EV-2 as a development platform and as an example interface for CMs,
the Cobranet Silicon Series, and other CobraNet related projects. The EV-2 connects to the CM
via the module's host interface. An 8051-type microcontroller interfaces to the CM's host port,
and a simple audio router on the EV-2 allows multiple audio inputs and outputs to connect to the
CM's serial audio interface. The EV-2 software provides a simple interface for audio routing on
the EV-2, as well as development support.
Features*:
• Analog audio I/O: Two channels of analog audio input converted to high quality, 24-bit, 48
kHz or 96 kHz digital audio. Two channels of 24-bit, 48 kHz or 96 kHz digital audio con-
verted to high quality, analog audio output. Refer to Appendix B for audio I/O specifica-
tions.
• Digital audio I/O: One stream of AES3 input and one stream of AES3 output. An AES3
stream is two channels of digital audio. The AES3 input stream is sample rate converted.
• 8051-type microcontroller: 64kB on-chip Flash Program Memory, 1kB internal SRAM,
32kB external SRAM and in-system programmability.
• Field programmability: The supplied EV-2 software provides a means to reprogram EV-2
microcontroller firmware for field upgrades or user development.
• RS232 Interfaces: Two RS232 interfaces, one direct to the CM and another to the micro-
controller.
Figure 1. EV-2 Block Diagram
Analog
Input
Analog
Output
C
M
M
O
D
U
L
E
I
N
T
E
R
F
A
C
E
VCXO ADC
DAC
AES
LEDs
SRAM
Hex
Switches
RS232
Interfaces
FPGA
8051
Output
Input