.. _nucleo_l496zg_board:

ST Nucleo L496ZG
################

Overview
********

The Nucleo L496ZG board features an ARM Cortex-M4 based STM32L496ZG MCU
with a wide range of connectivity support and configurations. Here are
some highlights of the Nucleo L476ZG board:


- STM32 microcontroller in QFP144 package
- USB OTG FS with Micro-AB connector
- Two types of extension resources:

  - Arduino Uno V3 connectivity
  - ST morpho extension pin headers for full access to all STM32 I/Os

- On-board ST-LINK/V2-1 debugger/programmer with SWD connector
- Flexible board power supply:

  - USB VBUS or external source(3.3V, 5V, 7 - 12V)
  - Power management access point

- 8 LEDs: user LEDs (LD1, LD2, LD3), communication LED (LD4), USB
  power fault(LD5), power LED (LD6), USB FS OTG (LD7, LD8)
- 2 push buttons: USER and RESET

.. image:: img/nucleo_l496zg.jpg
   :width: 250px
   :align: center
   :height: 250px
   :alt: Nucleo L496ZG

More information about the board can be found at the `Nucleo L496ZG website`_.

Hardware
********

The STM32L496ZG SoC provides the following hardware capabilities:

- Ultra-low-power with FlexPowerControl (down to 108 nA Standby mode and 91 uA/MHz run mode)
- Core: ARM |reg| 32-bit Cortex |reg|-M4 CPU with FPU, frequency up to 80 MHz, 100DMIPS/1.25DMIPS/MHz (Dhrystone 2.1)
- Clock Sources:

  - 4 to 48 MHz crystal oscillator
  - 32 kHz crystal oscillator for RTC (LSE)
  - Internal 16 MHz factory-trimmed RC ( |plusminus| 1%)
  - Internal low-power 32 kHz RC ( |plusminus| 5%)
  - Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by
    LSE (better than  |plusminus| 0.25 % accuracy)
  - 3 PLLs for system clock, USB, audio, ADC

- RTC with HW calendar, alarms and calibration
- LCD 8 x 40 or 4 x 44 with step-up converter
- Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors
- 16x timers:

  - 2x 16-bit advanced motor-control
  - 2x 32-bit and 5x 16-bit general purpose
  - 2x 16-bit basic
  - 2x low-power 16-bit timers (available in Stop mode)
  - 2x watchdogs
  - SysTick timer

- Up to 114 fast I/Os, most 5 V-tolerant, up to 14 I/Os with independent supply down to 1.08 V
- Memories

  - Up to 1 MB Flash, 2 banks read-while-write, proprietary code readout protection
  - Up to 320 KB of SRAM including 64 KB with hardware parity check
  - External memory interface for static memories supporting SRAM, PSRAM, NOR and NAND memories
  - Quad SPI memory interface

- 4x digital filters for sigma delta modulator
- Rich analog peripherals (independent supply)

  - 3x 12-bit ADC 5 MSPS, up to 16-bit with hardware oversampling, 200 uA/MSPS
  - 2x 12-bit DAC, low-power sample and hold
  - 2x operational amplifiers with built-in PGA
  - 2x ultra-low-power comparators

- 20x communication interfaces

  - USB OTG 2.0 full-speed, LPM and BCD
  - 2x SAIs (serial audio interface)
  - 4x I2C FM+(1 Mbit/s), SMBus/PMBus
  - 5x U(S)ARTs (ISO 7816, LIN, IrDA, modem)
  - 1x LPUART
  - 3x SPIs (4x SPIs with the Quad SPI)
  - 2x CAN (2.0B Active) and SDMMC interface
  - SWPMI single wire protocol master I/F
  - IRTIM (Infrared interface)

- 14-channel DMA controller
- True random number generator
- CRC calculation unit, 96-bit unique ID
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell |trade|


More information about STM32L496ZG can be found here:

- `STM32L496ZG on www.st.com`_
- `STM32L496 reference manual`_

Supported Features
==================

The Zephyr nucleo_l496zg board configuration supports the following hardware features:

+-----------+------------+-------------------------------------+
| Interface | Controller | Driver/Component                    |
+===========+============+=====================================+
| NVIC      | on-chip    | nested vector interrupt controller  |
+-----------+------------+-------------------------------------+
| UART      | on-chip    | serial port-polling;                |
|           |            | serial port-interrupt               |
+-----------+------------+-------------------------------------+
| PINMUX    | on-chip    | pinmux                              |
+-----------+------------+-------------------------------------+
| GPIO      | on-chip    | gpio                                |
+-----------+------------+-------------------------------------+
| I2C       | on-chip    | i2c                                 |
+-----------+------------+-------------------------------------+
| SPI       | on-chip    | spi                                 |
+-----------+------------+-------------------------------------+
| PWM       | on-chip    | pwm                                 |
+-----------+------------+-------------------------------------+
| RTC       | on-chip    | rtc                                 |
+-----------+------------+-------------------------------------+
| WATCHDOG  | on-chip    | System Window Watchdog              |
+-----------+------------+-------------------------------------+

Other hardware features are not yet supported on this Zephyr port.

The default configuration can be found in the defconfig file:
``boards/arm/nucleo_l496zg/nucleo_l496zg_defconfig``


Connections and IOs
===================

Nucleo L496ZG Board has 8 GPIO controllers. These controllers are responsible for pin muxing,
input/output, pull-up, etc.

For mode details please refer to `STM32 Nucleo-144 board User Manual`_.

Default Zephyr Peripheral Mapping:
----------------------------------

- UART_2 TX/RX : PD5/PD6
- UART_3 TX/RX : PD8/PD9
- LPUART_1 TX/RX : PG7/PG8
- PWM_1_CH1: PE9
- PWM_1_CH2: PE11
- PWM_1_CH3: PE13
- PWM_2_CH1: PA0
- I2C_1_SCL: PB8
- I2C_1_SDA: PB7
- SPI_1_SCK: PA5
- SPI_1_MISO: PA6
- SPI_1_MOSI: PA7
- USER_PB : PC13
- LD1 : PC7
- LD2 : PB7
- LD3 : PB14

System Clock
------------

Nucleo L496ZG System Clock could be driven by internal or external oscillator,
as well as main PLL clock. By default System clock is driven by PLL clock at 80MHz,
driven by 16MHz high speed internal oscillator.

Serial Port
-----------

Nucleo L496ZG board has 5 U(S)ARTs. The Zephyr console output is assigned to UART2.
Default settings are 115200 8N1.


Programming and Debugging
*************************

Applications for the ``nucleo_l496zg`` board configuration can be built and
flashed in the usual way (see :ref:`build_an_application` and
:ref:`application_run` for more details).

Flashing
========

Nucleo L496ZG board includes an ST-LINK/V2-1 embedded debug tool
interface.  This interface is supported by the openocd version
included in the Zephyr SDK since v0.9.5.

Flashing an application to Nucleo L496ZG
----------------------------------------

Connect the Nucleo L496ZG to your host computer using the USB port.
Then build and flash an application. Here is an example for the
:ref:`hello_world` application.

Run a serial host program to connect with your Nucleo board:

.. code-block:: console

   $ minicom -D /dev/ttyUSB0

Then build and flash the application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: nucleo_l496zg
   :goals: build flash

You should see the following message on the console:

.. code-block:: console

   Hello World! arm

Debugging
=========

You can debug an application in the usual way.  Here is an example for the
:ref:`hello_world` application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: nucleo_l496zg
   :maybe-skip-config:
   :goals: debug

.. _Nucleo L496ZG website:
   http://www.st.com/en/evaluation-tools/nucleo-l496zg.html

.. _STM32 Nucleo-144 board User Manual:
   http://www.st.com/resource/en/user_manual/dm00368330.pdf

.. _STM32L496ZG on www.st.com:
   http://www.st.com/en/microcontrollers/stm32l496zg.html

.. _STM32L496 reference manual:
   http://www.st.com/resource/en/reference_manual/dm00083560.pdf