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STM32L162VDY6XDTR Datasheet(PDF) 29 Page - STMicroelectronics |
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STM32L162VDY6XDTR Datasheet(HTML) 29 Page - STMicroelectronics |
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29 / 115 page  DocID027268 Rev 3 29/115 STM32L162VD-X Functional overview 48 They support dual slave addressing (7-bit only) and both 7- and 10-bit addressing in master mode. A hardware CRC generation/verification is embedded. They can be served by DMA and they support SM Bus 2.0/PM Bus. 3.18.2 Universal synchronous/asynchronous receiver transmitter (USART) The three USART and two UART interfaces are able to communicate at speeds of up to 4 Mbit/s. They support IrDA SIR ENDEC and have LIN Master/Slave capability. The three USARTs provide hardware management of the CTS and RTS signals and are ISO 7816 compliant. All USART/UART interfaces can be served by the DMA controller. 3.18.3 Serial peripheral interface (SPI) Up to three SPIs are able to communicate at up to 16 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 is configurable to 8 bits or 16 bits. The hardware CRC generation/verification supports basic SD Card/MMC modes. The SPIs can be served by the DMA controller. 3.18.4 Inter-integrated sound (I2S) Two standard I2S interfaces (multiplexed with SPI2 and SPI3) are available. They can operate in master or slave mode, and can be configured to operate with a 16-/32-bit resolution as input or output channels. Audio sampling frequencies from 8 kHz up to 192 kHz are supported. When either or both of the I2S interfaces is/are configured in master mode, the master clock can be output to the external DAC/CODEC at 256 times the sampling frequency. The I2Ss can be served by the DMA controller. 3.18.5 Universal serial bus (USB) The STM32L162VD-X device embeds a USB device peripheral compatible with the USB full-speed 12 Mbit/s. The USB interface implements a full-speed (12 Mbit/s) function interface. It has software-configurable endpoint setting and supports suspend/resume. The dedicated 48 MHz clock is generated from the internal main PLL (the clock source must use a HSE crystal oscillator). 3.19 CRC (cyclic redundancy check) calculation unit The CRC (cyclic redundancy check) calculation unit is used to get a CRC code from a 32-bit data word and a fixed generator polynomial. Among other applications, CRC-based techniques are used to verify data transmission or storage integrity. In the scope of the EN/IEC 60335-1 standard, they offer a means of verifying the Flash memory integrity. The CRC calculation unit helps compute a signature of the software during runtime, to be compared with a reference signature generated at link- time and stored at a given memory location. |
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