Functional overview STM32F072x8 STM32F072xB
Table 10. STM32F072x8/xB USART implementation (continued)
USART modes/features
(1)
USART1 and
USART2
USART3 and
USART4
IrDA SIR ENDEC block
LIN mode
Dual clock domain and wakeup from Stop mode
Receiver timeout interrupt
Modbus communication
Auto baud rate detection
Driver Enable
1. X = supported.
X
X
X
X
X
X
X
-
X
-
-
-
-
-
3.18 Serial peripheral interface (SPI) / Inter-integrated sound interface (I
2
S)
Two SPIs are 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.
Two standard I 2 S interfaces (multiplexed with SPI1 and SPI2 respectively) supporting four different audio standards can operate as master or slave at half-duplex communication mode. 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 an 8-bit programmable linear prescaler. When operating in master mode, they can output a clock for an external audio component at 256 times the sampling frequency.
Hardware CRC calculation
Rx/Tx FIFO
NSS pulse mode
I 2 S mode
TI mode
1. X = supported.
Table 11. STM32F072x8/xB SPI/I 2 S implementation
SPI features (1) SPI1 and SPI2
X
X
X
X
X
3.19 High-definition 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
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