Datasheet

DocID023353 Rev 7 27/133

STM32F303xB STM32F303xC Functional overview

3.21 Serial peripheral interface (SPI)/Inter-integrated sound

interfaces (I2S)

Up to three SPIs are able to communicate up to 18 Mbits/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.

Two standard I2S interfaces (multiplexed with SPI2 and SPI3) supporting four different

audio standards can operate as master or slave at half-duplex and full duplex

communication modes. They 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 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.

Refer to Table 7 for the features available in SPI1, SPI2 and SPI3.

3.22 Controller area network (CAN)

The CAN is compliant with specifications 2.0A and B (active) with a bit rate up to 1 Mbit/s. It

can receive and transmit standard frames with 11-bit identifiers as well as extended frames

with 29-bit identifiers. It has three transmit mailboxes, two receive FIFOs with 3 stages and

14 scalable filter banks.

3.23 Universal serial bus (USB)

The STM32F303xB/STM32F303xC devices embed an USB device peripheral compatible

with the USB full-speed 12 Mbs. The USB interface implements a full-speed (12 Mbit/s)

function interface. It has software-configurable endpoint setting and suspend/resume

support. The dedicated 48 MHz clock is generated from the internal main PLL (the clock

source must use a HSE crystal oscillator). The USB has a dedicated 512-bytes SRAM

memory for data transmission and reception.

Table 7. STM32F303xB/STM32F303xC SPI/I2S implementation

SPI features

(1)

1. X = supported.

SPI1 SPI2 SPI3

Hardware CRC calculation X X X

Rx/Tx FIFO X X X

NSS pulse mode X X X

I2S mode X X

TI mode XXX