STM32L443CC datasheet(48/207 Pages) STMICROELECTRONICS

48 / 207 page

Functional overview

STM32L443CC STM32L443RC STM32L443VC

48/207

DocID028739 Rev 2

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Transmission

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Three transmit mailboxes

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Configurable transmit priority

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Reception

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Two receive FIFOs with three stages

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14 Scalable filter banks

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Identifier list feature

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Configurable FIFO overrun

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Time-triggered communication option

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Disable automatic retransmission mode

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16-bit free running timer

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Time Stamp sent in last two data bytes

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Management

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Maskable interrupts

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Software-efficient mailbox mapping at a unique address space

3.33

Secure digital input/output and MultiMediaCards Interface

(SDMMC)

The card host interface (SDMMC) provides an interface between the APB peripheral bus

and MultiMediaCards (MMCs), SD memory cards and SDIO cards.

The SDMMC features include the following:

•

Full compliance with MultiMediaCard System Specification Version 4.2. Card support

for three different databus modes: 1-bit (default), 4-bit and 8-bit

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Full compatibility with previous versions of MultiMediaCards (forward compatibility)

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Full compliance with SD Memory Card Specifications Version 2.0

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Full compliance with SD I/O Card Specification Version 2.0: card support for two

different databus modes: 1-bit (default) and 4-bit

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Data transfer up to 48 MHz for the 8 bit mode

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Data write and read with DMA capability

3.34

Universal serial bus (USB)

The STM32L443xx devices 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 from the internal main PLL (the

clock source must use a HSE crystal oscillator) or 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.

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