STMicro Introduces Ultra-efficient STM32L4+ Series MCUs with Better Performance, Chrom-GRC Graphics Controller

STMicroelectronics has announced an upgrade to their STM32L4 series Cortex-M4 micro-controllers with STM32L4+ series upping the maximum frequency from 80 MHz to 120 MHz delivering up to 150 DMIPS (233 ULPMark-CP) , and ultra low power consumption as long as 33 nA in shutdown mode without RTC.

The new family also adds Chrom-GRC graphics controller (GFXMMU) that can handle both circular and square TFT LCD displays together with a MIPI DSI interface and displayer controller, making it ideal for wearables, Chrom-ART 2D accelerator for better graphics performance, two Octo SPI interfaces, and more memory (640KB max) and storage (up to 2MB flash).

STM32L4+ Block Diagram (Parts in Red Show New/Updated Features vs STM32L4)

If you want to know all differences between STM32L4 and STM32L4+, and/or learn how to use peripherals, STMicro has setup a nice free STM32L4+ online training page, which allow you to do just that either by downloading PDF documents, or following e-Presentations with slides and audio.

STM32L4+ appears to have the same power modes as STM32L4, except that it can turn SRAM3 on or off in STOP 2 mode.

Click to Enlarge

STM32L4+ series are available in different lines: STM32L4R5/S5, STM32L4R7/S7 (with TFT interface) and STM32L4R9/S9 (with MIPI‐DSI and with TFT interface) with details provided in the table below.

STM32L4+ series are software compatible with STM32L4 series, and mostly (but not entirely) pin-to-pin compatible.  Developers can use the same STM32 tools such as ST-Link and STM32CubeL4 embedded software, and three development board have been launched to get started with the new MCUs:

  • For headless development – NUCLEO-L4R5ZI STM32 Nucleo-144 development board with STM32L4R5ZI MCU. Supports Arduino, ST Zio and morpho connectivity ($19)

  • For wearables with round display – 32L4R9IDISCOVERY Discovery kit with STM32L4R9AI MCU ($89)

  • More complete kit with both a 4.3″ LCD TFT display and a 1.2″ MIPI DSI round LCD display – STM32L4R9I-EVAL Evaluation board with STM32L4R9AI MCU ($320)

STMicro STM32L4+ devices are already in production with price starting at $6.52 for orders of 10,000 pieces. Visit the product page for more information.

Via Time4EE

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octi-SPI was new to me.


willmore :
octi-SPI was new to me.

It’s also know as HyperBus


Really sad there ins’t an clk input hardware on these sbc or uController. Even popular SPI slave not work at good speed in modern linux soc, I2C slave too.
No cheap FIFO with dualport or dual port ram :/
Without clk input pin, no sync no gain