Nuvoton NPCX4M8F_EVB

Overview

The NPCX4M8F_EVB kit is a development platform to evaluate the Nuvoton NPCX4 series microcontrollers. This board needs to be mated with part number NPCX498F.

Hardware

ARM Cortex-M4F Processor
512 KB RAM and 64 KB boot ROM
ADC & GPIO headers
UART0 and UART1
FAN PWM interface
Jtag interface
Intel Modular Embedded Controller Card (MECC) headers

Supported Features

The following features are supported:

Interface	Controller	Driver/Component
NVIC	on-chip	nested vector interrupt controller
ADC	on-chip	adc controller
CLOCK	on-chip	reset and clock control
GPIO	on-chip	gpio
I2C	on-chip	i2c port/controller
PINMUX	on-chip	pinmux
PM	on-chip	power management
PSL	on-chip	power switch logic
PWM	on-chip	pulse width modulator
TACH	on-chip	tachometer sensor
UART	on-chip	serial port-polling; serial port-interrupt
WDT	on-chip	watchdog

Other hardware features are not currently supported by Zephyr (at the moment)

The default configuration can be found in the defconfig file: boards/nuvoton/npcx4m8f_evb/npcx4m8f_evb_defconfig

Connections and IOs

Nuvoton to provide the schematic for this board.

System Clock

The NPCX4M8F MCU is configured to use the 120Mhz internal oscillator with the on-chip PLL to generate a resulting EC clock rate of 15 MHz. See Processor clock control register (chapter 4 in user manual)

Serial Port

UART1 is configured for serial logs.

Programming and Debugging

This board comes with a Cortex ETM port which facilitates tracing and debugging using a single physical connection. In addition, it comes with sockets for JTAG-only sessions.

Flashing

If the correct headers are installed, this board supports both J-TAG and also the ChromiumOS servo.

To flash using Servo V2, μServo, or Servo V4 (CCD), see the Chromium EC Flashing Documentation [1] for more information.

To flash with J-TAG, install the drivers for your programmer, for example: SEGGER J-link’s drivers are at https://www.segger.com/downloads/jlink/

The openocd from Zephyr SDK 0.16.1 doesn’t include npcx4 support, so build openocd from source.:

sudo apt-get install libftdi-dev libusb-1.0.0-dev
git clone https://git.code.sf.net/p/openocd/code ~/openocd
cd ~/openocd
./bootstrap
./configure --enable-jlink --enable-ftdi
make clean
make
sudo make install

Build and flash the blinky sample.:

west build -t clean && \
  west build -c -p auto -b npcx4m8f_evb samples/basic/blinky && \
  west flash --openocd /usr/local/bin/openocd

Debugging

Use JTAG/SWD with a J-Link