General Description

The AK7719B is a highly integrated digital signal processor (DSP) with five digital interface ports. The built-in asynchronous sample rate converter (SRC) enables flexible connectivity in various system configurations. AKM’s DSP core is optimized for both narrowband and wideband voice processing, as well as full bandwidth digital audio processing. An integrated clock generator for the DSP master clock eliminates the need for external clocks. The RAM-based DSP can be programmed for user requirements. The AK7719B is housed in a 30-pin CSP package. It is a very low power device, suitable for mobile applications.

Features

□ Embedded DSP

- Flexible programming with built-in program and data memories

- Hardware accelerator

- Word length: 24-bits (Data RAM 24-bit floating point)

- Multiplier 20 x 20  40-bits (double precision available)

- Divider 20 / 20  20-bits

- ALU:

44-bit arithmetic operation (with 4-bit overflow margin)

24-bit floating point arithmetic and logic operation

- Program RAM: 4096w x 36-bits

- Coefficient RAM: 2048w x 20-bits

- Data RAM: 2048w x 24-bits (24-bit floating point)

- Offset Register: 32w x 15-bits

- Delay RAM: 16384w x 24-bits(24-bit floating point)

- 5625 steps at 16kHz sampling rate, 1875 steps at 48kHz sampling rate

- Internal clock generator

□ Audio Interface Format

- Left justified, PCM, I2S,

- 16/24bit linear

- Sampling rate 8kHz ~ 48kHz

- Up/Down Sampling Rate Converter: Port#1 (8kHz ↔ 16kHz)

□ Asynchronous Sample Rate Converters

□ μC I/F: I2C-Compatible, SPI

□ Operational, Sleep and Power-down Modes

□ Power Supply

VDD (DSP Core): 1.2V ±0.1V

TVDD (PCM I/F): 1.6V ~ 3.6V

□ Operating Temperature Range: -40C ~ 85C

□ Package: 30-Pin WL-CSP (2.94mm x 3.14mm, 0.5mm pitch)

□ Power Consumption: 9.2mA (11mW) typ. (Narrowband Handset mode operation)