STM32F215RET6 데이터 시트보기 (PDF) - STMicroelectronics

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STM32F215RET6

ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM, crypto, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

STMicroelectronics 

STM32F21xxx

Application block diagrams

A.5

Complete audio player solutions

Two solutions are offered, illustrated in Figure 87 and Figure 88.

Figure 87 shows storage media to audio DAC/amplifier streaming using a software Codec.

This solution implements an audio crystal to provide audio class I2S accuracy on the master

clock (0.5% error maximum, see the Serial peripheral interface section in the reference

manual for details).

Figure 87. Complete audio player solution 1

XTAL

25 MHz

or 14.7456 MHz

USB

Mass-storage

device

MMC/

SDCard

Cortex-M3 core

up to 120 MHz

Program memory

OTG

(host

mode) +

PHY

SPI/

FSMC

File

System

Audio

CODEC

User

application

SPI

GPIO

I2S

LCD

touch

screen

Control

buttons

DAC +

Audio

ampli

Figure 88 shows storage media to audio Codec/amplifier streaming with SOF

synchronization of input/output audio streaming using a hardware Codec.

ai16039c

Figure 88. Complete audio player solution 2

XTAL

25 MHz

or 14.7456 MHz

USB

Mass-storage

device

SOF

MMC/

SDCard

Cortex-M3 core

up to 120 MHz

SPI/

FSMC

OTG

+

PHY

Program memory

File

System

GPIO

I2S

SPI/

FSMC

User

application

SOF synchronization of input/output

audio streaming

1. SOF = start of frame.

LCD

touch

screen

Control

buttons

Audio PLL

+DAC

Audio

ampli

ai16040c

Doc ID 17050 Rev 8

157/173

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