6. Peripherals
The starter kit has a set of peripherals that showcase some of the features of the EFM32.
Be aware that most EFM32 I/O routed to peripherals are also routed to the breakout pads. This must be taken into consideration when
using the breakout pads for your application.
6.1 Push Buttons and RGB LEDs
The kit has two user push buttons marked BTN0 and BTN1. They are connected directly to the EFM32, and are debounced by RC
filters with a time constant of 1 ms. The buttons are connected to pins PC8 and PC9.
The kit also features two RGB LEDs marked LED0 and LED1, that are controlled by GPIO pins on the EFM32. The LEDs are connec-
ted in an active-low configuration, and each color can be PWM controlled using the EFM32's TIMER/WTIMER peripherals to generate a
wide variety of colors.
1B
PH10 (WTIM1_CC2 #6)
PH13 (TIM5_CC0 #2)
PH14 (TIM5_CC1 #2)
PC8 (GPIO)
PC9 (GPIO_EM4WU2)
EFM32
User Buttons
& RGB LEDs
PH11 (WTIM1_CC3 #6)
PH12 (WTIM1_CC0 #7)
PH15 (TIM5_CC2 #2)
1G
1R
0B
0R
0G
Figure 6.1. Buttons and LEDs
UG287: EFM32 Giant Gecko GG11 Starter Kit User's Guide
Peripherals
silabs.com
| Building a more connected world.
Rev. 1.10 | 15