OCROBOT ALPHA D21G18A is a low-power microcontroller using a 32-bit ARM® Cortex® M0 + processor. It ranges from 32-pin to 64-pin, with up to 256KB flash and 32KB SRAM. The maximum frequency of the device is 48MHz, up to 2.46 CoreMark / MHz.
Warning: Unlike most boards, the normal operating voltage of ALPHA D21G18A is 3.3V. The maximum voltage that the I / O pins can withstand is 3.3V. Applying a voltage higher than 3.3V to any I / O pin may damage the board.
- CPU:ARM Cortex-M0+ CPU running at up to 48MHz
- Flash: 256KB in-system self-programmable
- SRAM: 32KB
- Operating Voltage: 1.62V – 3.63V
- UART/USART: 6
- SPI: 6
- USB Device: 1
- PWM: 20
- USB Host/OTG: 1
- A/D: 14x12bit
- D/A: 1x10bit
DAC: A0 port, use analogWrite () function to provide 10-bit precision voltage output.
PCB size: 50.8mmX25.4mm
- MCU Data Sheet：D21G18A English version
- Schematic：ALPHA D21G18A