Using The Interrupt Pins; Using The Audio Interface; Table 3-3: Interrupt Pin Summary - Analog Devices ADSP-21161N EZ-KIT LITE Manual

3.6 Using the Interrupt Pins

The ADSP-21161N has 3 interrupt pins (IRQ0-2) that let you interact with the
running program. Each of the three external interrupts are directly accessible
through the push button switches SW5 - SW7 on the EZ-KIT Lite board. . For
more information on configuring the interrupt pins, see the ADSP-21161N DSP
Hardware Reference. Interrupts and their uses are described in

Table 3-3: Interrupt Pin Summary

Interrupt
IRQ0
IRQ1
IRQ2
Note: IRQ0 – IRQ3 are available on connector P10.

3.7 Using the Audio Interface

The audio interface on the EZ-KIT Lite board allows you to interface to the codec
and digital receiver through various connectors. See section
information about the connectors. The audio interface consists of three main ICs,
an AD1836, AD1852 and a CS8414.
The AD1836 multi-channel codec features six digital-to-analog converters
(DACs) and four analog-to-digital converters (ADCs), support multiple digital
stereo channels with 24-bit conversion resolution and a 96 kHz sample rate. The
AD1836 features a 108 dB dynamic range for each of its six DACs, and a 104 dB
dynamic range for its four ADCs.
The AD1852 is a complete 18/20/24-bit single-chip stereo digital audio playback
system. It is comprised of a multibit sigma-delta modulator, digital interpolation
filters, and analog output drive circuitry. Other features include an on-chip stereo
attenuator and mute, programmed through an SPI-compatible serial control port.
The AD1852 is fully compatible with all known DVD formats including 192kHz
and 96kHz sample frequencies and 24-bits. It also is backwards compatible by
supporting 50/15µs digital de-emphasis intended for "redbook" Compact Discs, as
well as de-emphasis at 32kHz and 48kHz sample rate.
The CS8414 is a monolithic CMOS device that receives and decodes audio data
up to 96kHz according to the AES/EBU, IEC958, S/PDIF, and EIAJ CP340/1201
interface standards. The CS8414 receives data from a transmission line, recovers
the clock and synchronization signals, and de-multiplexes the audio and digital
data. The CS8414 is setup to operate in I
ADSP-21161N EZ-KIT Lite Evaluation System Manual
Connected Use
to
SW5 IRQ0-2 are connected to the push buttons and supply
SW6 feedback for program execution. For instance, you
can write your code to trigger a flag when a routine is
SW7
complete.
2
S compatible mode.
Table 3-3.
4.5.2 for more
3-5