Nuvoton Technology: KM1M7CF Series with Security Functions

Product Summary

The KM1M7CF series is a 32-bit flash microcomputer equipped with Arm® Cortex®-M7, which has high processing power and high-performance analog mechanism, and features a security function for safe operation.

Equipped with high-speed/high-precision analog functions that are ideal for motor control/digital power supply control, it is also equipped with a security function that supports program updates and a 2-bank flash memory.

Product features

Built-in security features

In recent applications, the number of products that have a F/W update mechanism via network has increased. In order to achieve this, it is important to protect the system from threats such as "spoofing attacks" and "fake programs".

In this case, it is necessary to consider adding an encryption IC, but the KM1M7CF series has a built-in security function and can be executed safely without using an encryption IC. This makes it possible to achieve both miniaturization of the board and security measures.

Realization of high-speed feedback processing

In recent power electronics control, in order to achieve even higher efficiency, precision, and power savings, there is a demand for lower loss by using compound semiconductors such as SiC (silicon carbide) and GaN (gallium nitride) instead of the conventional silicon-based FET. To achieve this, high-speed, high-precision feedback processing and control are essential.

Nuvoton Technology's KM1M7BF series supports the functions required for high-speed, high-precision feedback processing and control.

Multi-function/polyphase PWM support

A maximum of 24 phases (complementary 12 channels) of PWM can be freely combined and synchronized, making it compatible with various systems. In addition, it is equipped with a wealth of PWM control functions that support the transition from analog control to digital control. Equipped with a control assist function that is friendly not only to hardware engineers but also to software engineers.

Contributes to reduction of peripheral parts

Analog parts such as a differential amplifier that can input negative voltages and window comparators are also built in. These reference voltages are set by an internal DAC. This contributes to the reduction of external components.

Overview of each function

CPU performance	Cortex®-M7 160MHz
floating point arithmetic	Single precision - double precision supported
Instruction/Data Flash	Max 256KB x 2Bank / 64KB
High speed A/D conversion	12bit / 0.2us (5Msps) / 3unit
PWM resolution	208ps
Built-in analog	12bit DAC, Window comparator
Safety function	Memory ECC, clock error detection, AD fault diagnosis
Security function	Secure Boot, true random numbers, encryption, etc.
Power-supply voltage	3.3V single power supply operation

Product Line

series	model number	The number of pins	ROM[KB]		RAM[KB]		Serial I/F	Security function	Package
			Instruction	Date	Instruction	Date
KM1M7CF0 series	KM1M7CF03N	80	512（256 x 2)	32（16 x 2)	64	64	Synchronous x 7ch(Max) (UART, SPI, I2C, LIN) SMBus x 1ch CAN FD x1ch * Depends on number of pins	-	80 pins TQFP
	KM1M7CF03K		256（128 x 2)
	KM1M7CF04N	64	512（256 x 2)						64 pins TQFP 10mm x 10mm
	KM1M7CF04K		256（128 x 2)
	KM1M7CF05N	48	512（256 x 2)						48 pins TQFP/QFN
	KM1M7CF05K		256（128 x 2)
	KM1M7CF06N	32	512（256 x 2)						32 pins TQFP
	KM1M7CF06K		256（128 x 2)
KM1M7CF1 series	KM1M7CF13N	80	512（256 x 2)	32（16 x 2)	64	64	Synchronous x 7ch(Max) (UART, SPI, I2C, LIN) SMBus x 1ch CAN FD x1ch * Depends on number of pins	Secure boot Crypto calculator (AES/SHA/ECC encryption) random number generator	80 pins TQFP
	KM1M7CF13K		256（128 x 2)
	KM1M7CF14N	64	512（256 x 2)						64 pins TQFP 10mm x 10mm
	KM1M7CF14K		256（128 x 2)
	KM1M7CF15N	48	512（256 x 2)						48 pins TQFP/QFN
	KM1M7CF15K		256（128 x 2)
	KM1M7CF16N	32	512（256 x 2)						32 pins TQFP
	KM1M7CF16K		256（128 x 2)

Product block diagram

KM1M7CF series block diagram

Use applications

・Digital power control (ACDC, DCDC, DCAC)
・Inverter control

Product support

Nuvoton Technology provides evaluation boards and evaluation environments for evaluating microcontrollers.

Evaluation board overview

・We provide a starter kit (NuMaker) that allows you to immediately start evaluating microcontrollers.
- Equipped with connectors for all pins of the microcomputer
- Built-in debugger function on board:
This makes it possible to build an evaluation environment simply by connecting a PC and NuMaker with a USB cable.
- Equipped with Arduino UNO compatible expansion terminal

Overview of development environment

・As an integrated development environment, the following environment is supported.
- IAR Embedded Workbench
- Keil MDK-ARM
・To support code development, Nuvoton also provides the following tools:
- Peripheral Code Generator: A tool that uses a GUI to generate sample code for initializing peripherals built into the microcomputer
- RAM monitor tool: A tool that monitors the RAM status of the microcomputer in real time and improves debugging and analysis efficiency
・As a model-based development environment, we also provide each simulation model for Mathworks' Matlab/simlink.