The AM1808 SoC has 2 Enhanced High Resolution Pulse Width Modulators (eHRPWMs) and 3 Enhanced Capture Modules (eCAPs) that can be configured as PWMs.

The EHRPWMs actually have 2 PWM outputs (A/B) per device for a total of 4 EHRPWMs.


Device Connection
EHRPWM0A Not used/connected
EHROWM0B Drives the EV3 speaker to produce sound
EHRPWM1A Output port B motor driver
EHRPWM1B Output port A motor driver
ECAP0 Output port C motor driver
ECAP1 Output port D motor driver
ECAP2 Bluetooth “slow clock” @ 32.767kHz