Datasheet

STM32F051x Functional overview
Doc ID 022265 Rev 3 25/105
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 Ta ble 1 1 for the differences between SPI1 and SPI2.
3.19 High-definition multimedia interface (HDMI) - consumer
electronics control (CEC)
The device embeds a HDMI-CEC controller that provides hardware support for the
Consumer Electronics Control (CEC) protocol (Supplement 1 to the HDMI standard).
This protocol provides high-level control functions between all audiovisual products in an
environment. It is specified to operate at low speeds with minimum processing and memory
overhead. It has a clock domain independent from the CPU clock, allowing the HDMI_CEC
controller to wakeup the MCU from Stop mode on data reception.
3.20 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 11. STM32F051x SPI/I2S implementation
SPI features
(1)
1. X = supported.
SPI1 SPI2
Hardware CRC calculation X X
Rx/Tx FIFO X X
NSS pulse mode X X
I2S mode X
TI mode X X