Firefly 32 BIT LITE is perhaps the smallest and lightest 32bit ESC that uses STM32F051 48MHZ ARM 32-bit micro-processor and has 470uF capacity.
Prop moving in the wrong direction??? No problem. Power off, power on again and with 3 secs physically rotate the prop is the right direction and it's done. No need to de-solder and re-solder the wires again.

Supports Dshot

• With ESC passthrough, motor reverse, anti-desync

• No external electrolytic capacitor.

• Use STM32F051 48MHZ ARM 32-bit micro-processor and has 470uF capacity. Accurate speed control, high signal acquisition precision

• Fast throttle response, excellent linear.

• Automatic detect if it is the ordinary remote control signal (PWM) 50-500Hz , One-Shot and Multi-shot signals.

• Has Synchronous rectification technology to increase the working efficiency of ESC.

• Regenerative braking, active brake made the motor deceleration response increased significantly.

• PWM output frequency is 24 KHz.

• Throttle resolution is about 1480 steps.

• Ordinary remote control signal throttle limits 900us~2400us;One-Shot125, but the remote control signal until 100us~300us

• Max. RPM: 450,000rolls (2 poles), 150,000rolls (6 poles), 75,000rolls (12 poles)

• Supports Dshot

• With ESC pass through, motor reverse, anti desync

• No external electrolytic capacitor.

• Use STM32F051 48MHZ ARM 32-bit micro-processor and has 470uF capacity. Accurate speed control, high signal acquisition precision

• Fast throttle response, excellent linear.

• Automatic detect if it is the ordinary remote control signal (PWM) 50-500Hz , One-Shot and Multi-shot signals.

• Has Synchronous rectification technology to increase the working efficiency of ESC.

• Regenerative braking, active brake made the motor deceleration response increased significantly.

• PWM output frequency is 24 KHz.

• Throttle resolution is about 1480 steps.

• Ordinary remote control signal throttle limits 900us~2400us;One-Shot125, but the remote control signal until 100us~300us

• Max. RPM: 450,000rolls (2 poles), 150,000rolls (6 poles), 75,000rolls (12 poles)
  
  Model : FireFly 22A
  Weight : 8.5g
  Dimension : 27*14mm
  Constant current : 22A
  Max current : 26A
  BEC : No
  Input : 2-4S