Datasheet

STM32F405xx, STM32F407xx Application block diagrams
Doc ID 022152 Rev 2 161/167
Figure 90. Master clock (MCK) used to drive the external audio DAC
1. I2S_SCK is the I2S serial clock to the external audio DAC (not to be confused with I2S_CK).
Figure 91. Master clock (MCK) not used to drive the external audio DAC
1. I2S_SCK is the I2S serial clock to the external audio DAC (not to be confused with I2S_CK).
I2S_CK
I2S controller
I2S_MCK = 256 × F
SAUDIO
= 11.2896 MHz for F
SAUDIO
= 44.1 kHz
= 12.2880 MHz for F
SAUDIO
= 48.0 kHz
/(2 x 16)/8
/I2SD
F
SAUDIO
I2S_SCK
(1)
= I2S_MCK/8 for 16-bit stereo
for 16-bit stereo
/(2 x
32)/4
for
32-bit stereo
F
SAUDIO
2,3,4,..,129
= I2S_MCK/4 for 32-bit stereo
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I2SCOM_CK
I2S controller
/(2 x 16)
/I2SD
F
SAUDIO
I2S_SCK
(1)
for 16-bit stereo
/(2 x 32)
for 32-bit stereo
F
SAUDIO
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