Functional overview STM32F038x6
22/102 DocID026079 Rev 3
3.15 Serial peripheral interface (SPI) / Inter-integrated sound
interface (I
2
S)
The SPI is able to communicate up to 18 Mbit/s in slave and master modes in full-duplex
and half-duplex communication modes. The 3-bit prescaler gives 8 master mode
frequencies and the frame size is configurable from 4 bits to 16 bits.
One standard I
2
S interface (multiplexed with SPI1) supporting four different audio standards
can operate as master or slave at half-duplex communication mode. It can be configured to
transfer 16 and 24 or 32 bits with 16-bit or 32-bit data resolution and synchronized by a
specific signal. Audio sampling frequency from 8 kHz up to 192 kHz can be set by an 8-bit
programmable linear prescaler. When operating in master mode, it can output a clock for an
external audio component at 256 times the sampling frequency.
3.16 Serial wire debug port (SW-DP)
An ARM SW-DP interface is provided to allow a serial wire debugging tool to be connected
to the MCU.
Table 9. STM32F038x6 SPI/I
2
S implementation
SPI features
(1)
1. X = supported.
SPI
Hardware CRC calculation X
Rx/Tx FIFO X
NSS pulse mode X
I
2
S mode X
TI mode X
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