Datasheet

DocID028794 Rev 4 53/224
STM32L433xx Functional overview
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The CAN peripheral supports:
• Supports CAN protocol version 2.0 A, B Active
• Bit rates up to 1 Mbit/s
• Transmission
– Three transmit mailboxes
– Configurable transmit priority
• Reception
– Two receive FIFOs with three stages
– 14 Scalable filter banks
– Identifier list feature
– Configurable FIFO overrun
• Time-triggered communication option
– Disable automatic retransmission mode
– 16-bit free running timer
– Time Stamp sent in last two data bytes
• Management
– Maskable interrupts
– Software-efficient mailbox mapping at a unique address space
3.32 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
• Full compatibility with previous versions of MultiMediaCards (forward compatibility)
• Full compliance with SD Memory Card Specifications Version 2.0
• Full compliance with SD I/O Card Specification Version 2.0: card support for two
different databus modes: 1-bit (default) and 4-bit
• Data transfer up to 48 MHz for the 8 bit mode
• Data write and read with DMA capability
3.33 Universal serial bus (USB)
The STM32L433xx 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
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