STM32L062T8 datasheet(35/118 Pages) STMICROELECTRONICS

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STM32L062x8

Functional overview

Only a 32.768 kHz clock (LSE) is needed to allow LPUART communication up to 9600

baud. Therefore, even in Stop mode, the LPUART can wait for an incoming frame while

having an extremely low energy consumption. Higher speed clock can be used to reach

higher baudrates.

LPUART interface can be served by the DMA controller.

3.19.4

Serial peripheral interface (SPI)/Inter-integrated sound (I2S)

One SPI is 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 USARTs with synchronous capability can also be used as SPI master.

The SPI can be served by the DMA controller.

Refer to Table 13 for a summary pf SPI features.

3.19.5

Universal serial bus (USB)

The STM32L062x8 embed a full-speed USB device peripheral compliant with the USB

specification version 2.0. The internal USB PHY supports USB FS signaling, embedded DP

pull-up and also battery charging detection according to Battery Charging Specification

Revision 1.2. The USB interface implements a full-speed (12 Mbit/s) function interface with

added support for USB 2.0 Link Power Management. It has software-configurable endpoint

setting with packet memory up to 1 KB and suspend/resume support. It requires a precise

48 MHz clock which can be generated by the internal 48 MHz oscillator in automatic

trimming mode. The synchronization for this oscillator can be taken from the USB data

stream itself (SOF signalization) which allows crystal-less operation.

3.20

Clock recovery system (CRS)

The STM32L062x8 embed a special block which allows automatic trimming of the internal

48 MHz oscillator to guarantee its optimal accuracy over the whole device operational

range. This automatic trimming is based on the external synchronization signal, which could

be either derived from USB SOF signalization, from LSE oscillator, from an external signal

on CRS_SYNC pin or generated by user software. For faster lock-in during startup it is also

possible to combine automatic trimming with manual trimming action.

Table 13. SPI/I2S implementation

SPI features(1)

1. X = supported.

SPI1

Hardware CRC calculation

I2S mode

TI mode

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