Audio/HF DSP with 2-Channel SRC

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The AK7736B is a highly integrated audio digital signal processor with integrated 2ch SRC. It includes internal memories for digital audio processing, that allows surround effect process, time alignment and parametric equalizing. Moreover, the AK7736B can process both data and filter coefficients as floating point data so that high accuracy IIR/FIR filter performance can be achieved easily. The AK7736B can operate a hands-free software by AKM as well as sound processing, by programs downloaded via the microprocessor interface.

Key Features

      · Applications: Car Navigations, Car Audio Systems

      · DSP Block

            - Word length: 24-bit

            - Processing Speed: 8.1 ns (2560step/fs; fs = 48kHz)

            - Step                          fs=48kHz: Maximum 2560 step

                  fs=8kHz: Maximum 15360step

                  fs=16kHz: Maximum 7680step

            - Multiplication: 20 x 24 → 44-bit (Double precision arithmetic available)

            - Divider 20 / 20 → 20-bit (floating point normalization function)

            - ALU: 48-bit arithmetic and logic operation (overflow margin 4-bit)

            - Shift: Multiple DBUS ±15bit Shift with indirect shifting function

            - Program RAM (PRAM): 6144word x 36-bit

            - Coefficient RAM (CRAM): 4096word x 24-bit

            - Data RAM (DRAM): 4096 x 24-bit (Variable Bank Size)

            - Offset Register (OFREG): 32word x 15-bit

            - Delay RAM (DLRAM): 16384kword x 24-bit

            - Register:     48-bit × 4 (ACC) [ALU]

                  24-bit × 12 (TMP) [DBUS connection]

                  24-bit × 6 level stack (PTMP) [DBUS connection]

      · Stereo 24-bit SRC

            -SRC: FSI=8kHz~96kHz / FSO=8kHz~96kHz (FSO/FSI = 0.167~6.0)

      · Mono 24-bit Simple SRC

            -FSCONV: FSI=44.1kHz~48kHz / FSO=8kHz~16kHz

      · Digital Interface Input/Output

            - 8ch Serial Data Inputs

            - 8ch Serial Data Outputs

            -Sampling Frequency: 8~96kHZ

      · Microcontroller Interface: SPI, I2C BUS (400kHz Fast-Mode)

      · PLL

      · Power Supply:

            -VDD   3.0~3.6V  typ 3.3V  (Internal Regulator)

            -TVDD 1.7~3.6V (1~8pin)  

      · Operating Temperature Range: -40°C ~ 85°C

      · Package: 48-pin LQFP

      · Evaluation Board: AKD7736B

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Block Diagram

Block Diagram

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