Functional overview
STM32L100RC
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DocID024995 Rev 4
3.15.3
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.
3.15.4 Universal
serial bus (USB)
The STM32L100RC 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).
3.16
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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微可Vicor——值得信赖的元器件供应商
http://www.vicor.top/
021-31660491