RN52 datasheet(7/26 Pages) MICROCHIP

7 / 26 page

 2015 Microchip Technology Inc.

DS70005120A-page 7

RN52

1.1

Audio Interface Circuit

Description

The RN52 audio interface circuit consists of:

• Analog audio interface with differential audio

inputs and outputs

• Digital audio interface with configurable S/PDIF

and I2S interface (A2DP audio output only)

The audio input circuitry has a dual audio input that can

be configured as single-ended or fully differential and

programmed for microphone or line input. It has an

analog and digital programmable gain stage so that it

can be optimized for different microphones. See

Figure 1-5.

1.1.1

DIGITAL AUDIO INTERFACE

The stereo audio CODEC interface has a digital audio

interface. It supports the I2S and S/PDIF interfaces.

The RN52 I2S interface is I2S Master and provides the

bit clock and phase sync clock. The I2S or S/PDIF

interface can be configured through command console.

The typical application interface can be seen in

Figure 1-4.

The audio resolution supported is 24-bit and the max

channel size is 32-bit. The supported sample rates are

8KHz, 32KHz, 44.1KHz and 48KHz. The audio resolu-

tion and the sample rate can be configured using the

UART console command. Refer the RN52 command

specification for more information.

FIGURE 1-4:

I2S AND SPDIF CONNECTIONS

1.1.2

ANALOG AUDIO INTERFACE

The audio input circuitry has a dual audio input that can

be configured as single-ended or fully differential and

programmed for microphone or line input. It has an

analog and digital programmable gain stage so that it

can be optimized for different microphones. The micro-

phone inputs MIC_L+, MIC_L-, MIC_R+ and MIC_R-

are shown in Figure 1-6.

The audio output circuitry consists of a differential

speaker output preceded by a gain stage and a class

AB amplifier. The speaker outputs SPK_L+, SPK_L-,

SPK_R+ and SPK_R- are shown in Figure 1-6.

The fully differential architecture in the analog signal

path results in low noise sensitivity and good power

supply rejection while effectively doubling the signal

amplitude. It operates from a 1.5V single power supply

and uses a minimum of external components.

The typical application interface is shown in Figure 1-5.

RN52

I2S MASTER

SDOx

SDIx

SCKx

SSx

DAC/ADC/CODEC/DSP

I2S SLAVE

SDIx

SDOx

SCKx

SSx

Serial Clock

Frame Sync. Pulse

RN52

S/PDIF

GND

S/PDIF OUT

S/PDIF IN

VDD

DAC/ADC/CODEC/DSP

S/PDIF

GND

S/PDIF IN

S/PDIF OUT

VDD IN

RN52 датащи(PDF) 7 Page - Microchip Technology

RN52 датащи(HTML) 7 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

датащи скачать

ссылки URL