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rev 0
PG 11 Jan 07
Introduction
The 9307 CPU board is used in the NH00 and KA3. It is the main digital 'engine' providing the
main system CPU and DSP for audio processing. This document provides a circuit description for
this board.
Block Diagram
USB x3
Serial x2
SDRAM
256MBit
AKAI 9307 CPU Board Circuit Description
I2S audio
x3
x2
ARM CPU
EP9307
SPI bus
FLASH
32kHz
64MBit
SHARC DSP
ADSP-21261
RTC
I2S audio
x3
x2
To codec
To control
board
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