Functional overview
STM32F302xx/STM32F303xx
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.
Table 7.
STM32F30xB/C SPI/I2S implementation
SPI features(1)
SPI1
SPI2
SPI3
Hardware CRC calculation
Rx/Tx FIFO
X
X
X
X
X
X
X
X
X
X
X
X
X
NSS pulse mode
I2S mode
TI mode
X
1. X = supported.
3.22
3.23
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.
Universal serial bus (USB)
The STM32F302xx/STM32F303xx 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.
3.24
Infrared Transmitter
The STM32F302xx/STM32F303xx devices provide an infrared transmitter solution. The
solution is based on internal connections between TIM16 and TIM17 as shown in the figure
below.
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Doc ID 023353 Rev 5
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