Analog Devices ADSP-BF592 EZ-KIT Lite, Manual

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ADSP-BF592 EZ-KIT Lite Evaluation System Manual 1-13
Using ADSP-BF592 EZ-KIT Lite
SPI Flash Memory Interface
SPI flash memory of the ADSP-BF592 EZ-KIT Lite is a 16 Mb Numonyx
M25P16 device. The device is selected via the
SPI0_SEL1
signal.
SPI flash memory is pre-loaded with boot code for the power-on-self test
(POST) program. For more information, refer to
“Power-On-Self Test”
on page 1-14 .
Audio Interface
The audio interface of the EZ-KIT Lite consists of a low-power stereo
codec, SSM2603, with an integrated headphone driver and associated pas-
sive components. There are two inputs, a stereo line in, and a mono
microphone, as well as two outputs, a headphone, and a stereo line out.
The codec has two integrated stereo analog-to-digital converters (ADCs),
two digital-to-analog converters (DACs), and requires minimal external
circuitry.
The codec is connected to the processor via the processor’s serial port 0.
SPORT0 is disconnected from the codec by turning
OFF
switch
SW1
, which
makes available SPORT0 to the expansion interface II. See “SPORT0
Enable Switch (SW1)” on page 2-7 for more information about
SW1
.
The codec is controlled via a 2-wire interface (TWI).
Mic gain values of 14 dB, 0 dB, or -6 dB are selectable through switch
SW10
. For more information, see “MIC Gain Switch (SW10)” on
page 2-10 .
Microphone bias is provided through a low-noise reference voltage. A
jumper on positions 2 and 3 of
JP5
connects the
MICBIAS
signal to the
audio jack. Placing a jumper on positions 1 and 2 of
JP5
connects the bias
directly to the mic signal. For more information, see “MIC Select Jumper
(JP5)” on page 2-13 .