Merge the two half-duplex I2S in STM32F07X to 1 full duplex I2S

[CWang.12]

I need to use the I2S of uC to communicate the Codec with the full duplex mode.Can I use the two half-duplex I2S in STM32F07X (e.g., STM32F071CBT7TR) to get that? I know that in the STM32F4 series, this function can be achieved with two half-duplex I2S.

[Andrew Neil]

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[waclawek.jan]

Yes. Use one as master, the other as slave, connect both clocks externally.

JW

[CWang.12]

Thanks，

But why modify the SPI/I2S resource for this functionality in the STM32F4x family?(The means of provision can be internal connect I2S_SCK, I2S_WS of 2 I2S together)

​In my opinion, Other than that （ connect both clocks externally）, STM32F07x （ implements a full duplex I2S in the same way as STM32F4x. What else am I getting wrong?

Br​

[waclawek.jan]

Yes, it's a missed opportunity that woul make the 'F0​ family better, but it is what it is.

JW​