GENERAL DESCRIPTION
The NuMicro M091 series 32-bit microcontroller is designed for analog sensor applications. It features
rich analog peripherals including up to 4 sets of 8 MHz gain bandwidth (GBW) with 50V operational
amplifier (OPA), 4 sets of 12-bit DAC, 2 levels of internal voltage reference, up to 16 channels of 2
MSPS 12-bit SAR ADC, built-in temperature sensor with ±1.6°C deviation from 0°C to 70°C and ±2°C
deviation from -40°C to 105°C.
The M091 series is based on Arm Cortex-M0 core with 32-bit hardware multiplier/divider. It runs up to
72 MHz and features 32 Kbytes and 64 Kbytes Flash memory, 8 Kbytes SRAM, 2.7V ~ 3.6V operating
voltage, 5V I/O tolerance, and -40°C to +105°C operating temperature.
The M091 series provides plenty of peripherals including up to 6 sets of 32-bit timers, 1 set of UART
with RS485 and One-wire mode, 1 set of SPI, 2 sets of I2C supporting 1 MHz Slave mode, 6 channels
of 16-bit BPWM, and up to 7 channels of PDMA to offload CPU loading.
To fit the small form factor requirement of the analog sensor, the M091 series provides the QFN 33-pin
(4x4 mm) and QFN 48-pin (5x5 mm) small form factor package to make the neat and compact PCB
design.
For the development system, Nuvoton provides the NuMaker evaluation board and Nuvoton Nu-Link
debugger. The 3rd Party IDE such as Keil MDK, IAR EWARM, and Eclippse IDE with GNU GCC
compilers are also supported.