Stm32L4 Series Overview; Table 1. Product Category Overview - ST STM32L1 Series Application Note

STM32L4 Series overview

1 STM32L4 Series overview
The STM32L4 Series forms a perfect fit in terms of ultra-low-power, performances, memory
size, and peripherals at a cost effective price.
In particular, the STM32L4 Series allows higher frequency/performance operation than
STM32L1 Series, including a Cortex
optimized Flash memory access through the adaptive real-time memory accelerator (ART
Accelerator™).
The STM32L4 Series products are divided in categories as per
order to easily refer to each group of products in the rest of the document.
Category 2
Category 4
1. Category 2 devices are referred as "Cat. 2" devices within this document.
2. Category 4 devices are referred as "Cat. 4" devices within this document.
The STM32L4 Series includes a larger set of peripherals with advanced features and
optimized power consumption compared to the STM32L1:
•
Touch sensing controller (TSC)
•
Controller area network (bxCAN)
•
Single wire protocol interface (SWPMI)
•
Serial audio interface (SAI)
•
Low-power UART (LPUART)
• Infrared interface (IRTIM)
•
Low-power timer (LPTIM)
• Digital filter for sigma delta modulators (DFSDM)
•
Voltage reference buffer (VREFBUF)
• Quad-SPI interface (QUADSPI)
•
Firewall (FW)
• Additional SRAM2 (32 KB for Cat. 2 devices, 16 KB for Cat. 4 devices) with data
preservation in Standby mode
•
Clock recovery system (CRS) for USB (for Cat. 4 devices)
The Cat. 4 devices implement a reduced set of features compared to the Cat. 2 devices:
• No FMC (external memory controller for static memory)
•
SRAM1 limited to 48KB instead of 96KB on Cat. 2 devices
• No Digital filter for sigma delta modulators (DFSDM)
•
USB FS instead of OTG FS
It also provides optimized power consumption and enriched set of low-power mode.
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Table 1. Product category overview

Type
(1)
STM32L476xx, STM32L486xx
(2)
STM32L433xx, STM32L443xx, STM32L432xx, STM32L442xx
DocID027094 Rev 3
®
-M4 @80 MHz versus Cortex
Part number
AN4612
®
-M3 @32 MHz and
Table 1. This is done in