This page is a summary of LPC1769 Pin Usage concerning only hardware PWM capable pins.
Hardware PWM is available only on pins 2.0 to 2.5, 1.18, 1.20, 1.21, 1.23, 1.24, 1.26, 3.25 and 3.26
If you plan to use a hobby servo, LEDs, lasers or any kind of device which require PWM with the Switch module, ensure to pick the right pin depending on your board version.
Available hardware PWM pins
| ARM Pin | 3X/3XC | 4X/4XC | 5X/5XC | Assignment | Comment |
|---|---|---|---|---|---|
| P1.18 | leds_disable | leds_disable | leds_disable | led1 | set leds_disable in config to use it |
| P1.20 | leds_disable | leds_disable | leds_disable | led3 | set leds_disable in config to use it |
| P1.21 | leds_disable | leds_disable | leds_disable | led4 | set leds_disable in config to use it |
| P1.23 | available | available | 3rd large fet | ||
| P1.24 | alpha_min_endstop | can be used on delta without min endstops | |||
| P1.26 | beta_min_endstop | can be used on delta without min endstops | |||
| P2.0 | alpha_step_pin | ||||
| P2.1 | beta_step_pin | ||||
| P2.2 | gamma_step_pin | ||||
| P2.3 | available | delta_step_pin | |||
| P2.4 | psu.output_pin | ||||
| P2.5 | bed.heater_pin | ||||
| P3.25 | available | available | available | used for encoder pin for all panels | |
| P3.26 | available | available | available | used for encoder pin for all panels |
Depending on the configuration
- the 5X board have 2 to 5 available PWM pins
- the 4X board have 3 to 6 available PWM pins
- the 3X board have 4 to 7 available PWM pins
