M451
May. 4, 2018
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GENERAL DESCRIPTION
The M451 series includes a total of 33 ARM
®
Cortex
®
-M4F based products, including the M451
Base Series, M452 USB Series, M453 CAN Series, and M451M Series which is pin compatible
with M051 LQFP48 and M058S LQFP64. By planning a complete product line, Nuvoton hopes to
fulfill the demand for the ARM
®
Cortex
®
-M4F core with products at all levels and realize its
customer commitment: total support for long-term competitiveness enhancement, and to fulfill
their current product development demand and future innovation imagination.
The M451 series embedded with the ARM
®
Cortex
®
-M4F core supports DSC (digital signal
controller) and FPU (float point unit) and features high performance computing capability running
up to 72 MHz, built-in 256/128/72/40 KB Flash ROM, 32/16 KB SRAM complying with IEC60730
and independent 4 KB in-system programming Flash ROM for developing more flexible online
upgrade code that support external UART, SPI, I
2
C, CAN and USB. It also supports EBI to
provide greater flexibility for external memory. The entire M451 series is provided with
outstanding specifications: four 32-bit timers, dual watchdogs, and integrates plenty of peripherals
such as PDMA and RTCs, five UARTs that support 16-byte FIFO, three sets of SPI controllers
that support quad mode, two I²C devices that support SMBus and PMBus, two sets of I
2
S, two
LINs, CAN bus, ISO-7816-3 interface, full-speed USB OTG, full-speed USB devices, 16-channel
12-bit ADC with 1 MSPS conversion rate, built-in reference voltage (V
REF
) for circuit generation,
12-bit DAC, two analog comparators and temperature detectors.
The M451 series provides two special designs. One is high-resolution 144 MHz PWM with high-
speed electromechanical control timer and resolution<7ns. In conjunction with a driver ADC, it
delivers hardware brake protection and pulse capture functions to save MCU computing burden
and effectively carry out advanced computing required by motor control, making it exceptionally
outstanding in industrial automation and motor control performance. The other is VAI (Voltage
Adjustment Interface) system to support voltage level adjustment with individual I/O (1.8V-5.5V)
for saving additional cost on adjusting the interface voltage difference of peripheral components.
The M451 series also provides the wide operating voltage (2.5V-5.5V) and 5V-tolerance input I/O
to significantly enhance system stability, industrial operating temperature (-40°C - 105°C),
22.1184 MHz internal RC oscillator (HIRC variation < ±2%) and 32.768 kHz external crystal
oscillator to trim HIRC (HIRC variation < ±0.25%) working at -
40˚C- 105˚C to boost system
immunity and adequately fulfill the high precision demand of communications. The M451 series is
specifically suitable for high-performance and high-precision applications, such as industrial
control, system automation, security surveillance, autotronics and digital power control.
Product Line
USB
CAN
UART
I
2
C
I
2
S
SPI
PWM
ADC
DAC
RTC
EBI
M453
●
●
●
●
●
●
●
●
●
●
●
M452
●
--
●
●
●
●
●
●
●
●
●
M451
--
--
●
●
●
●
●
●
●
●
●
M451M
(M051 Pin Compatible)
--
--
●
●
●
●
●
●
●
--
●
Table 1-1 Key Features Support Table
The NuMicro
®
M451 series is suitable for a wide range of applications such as:
Industrial Automation
PLCs
Inverters
Home Automation
