External Port; Host Processor Interface (Hpi); Sport0 And Sport2 - Audio Interface; Spi - Audio Interface - Analog Devices ADSP-21161N EZ-KIT LITE Manual

4.2.1 External Port

The external port is connected to a 512K x 8-bit flash memory. This memory is
connected to the boot memory select (~BMS) pin and the memory select 1
(~MS1) pin, allowing the flash memory to be used to boot the DSP as well as
store information during normal operation. Refer to section
about the location of the flash memory in the DSP's memory map.
The external memory interface is also connected to 1M x 48-bit SDRAM
memory. This memory is connected to the memory select 0 (~MS0) pin. Refer to
section 4.3.1 for information about configuring the width of the SDRAM. Refer
to section 3.3 for information about the location of the flash memory in the DSP's
memory map.
Some of the address, data, and control signals are available externally via two off-
board connectors. The pinout of the EP connectors (P9 and P10) can be found in
APPENDIX B:

4.2.2 Host Processor Interface (HPI)

The Host Port Interface (HPI) signals are brought to an unpopulated off board
connector P9. This allows the HPI to interface to a user application. The pinout
of the host port connector (P9) can be found in
4.2.3 SPORT0 and SPORT2 – Audio Interface
SPORT0 and SPORT2 are connected to the AD1836 codec (U10). A 3.5mm
stereo jack and four RCA mono jacks allow audio to be input. A 3.5mm stereo
jack and eight RCA mono jacks allow audio to be output.
The codec contains two input channels. One channel is connected to a 3.5mm
stereo jack and two RCA jacks. The 3.5mm stereo jack can be connected to a
microphone. The two RCA jacks can be connected to a line out from an audio
device. You can supply an audio input to the codec microphone input channel
(MIC1) or to the LINE_IN input channel. The jumper settings of JP1 determine
the codec channel driven by the input jack (P3).

4.2.4 SPI - Audio Interface

The SPI is connected to the AD1836 and AD1852. This is used for writing and
reading from control registers on the devices.
ADSP-21161N EZ-KIT Lite Evaluation System Manual
SCHEMATIC.
3.3 for information
APPENDIX B: SCHEMATIC.
4-3