STM32F215RET6 データシートの表示（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 

Application block diagrams

Figure 89. Audio player solution using PLL, PLLI2S, USB and 1 crystal

XTAL

25 MHz

or 14.7456 MHz

Div

by M

PLL

x N1

up to

Div 120 MHz

by P

Div

by Q

PLLI2S Div

x N2

by R

Cortex-M3 core

up to 120 MHz

OTG

48 MHz

PHY

STM32F21xxx

MCO1/

MCO2

MCLK

in

MCO1PRE

MCO2PRE

I2S

<0.04%

accuracy)

MCLK out

SCLK

DAC +

Audio

ampli

ai18412b

Figure 90. Audio PLL (PLLI2S) providing accurate I2S clock

CLKIN

PLLI2S

Phase lock detector

/M

M=1,2,3,..,64

1 MHz

PhaseC 192 to 432 MHz

VCO

/N

I2S_MCK = 256 × FSAUDIO

11.2896 MHz for 44.1 kHz

12.2880 MHz for 48.0 kHz

N=192,194,..,432

I2SCOM_CK

/R

R=2,3,4,5,6,7

I2S CTL

I2S_MCK

I2SD=2,3,4.. 129

ai16041b

158/173

Doc ID 17050 Rev 8

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