Peripheral APIs¶ Note Peripheral APIs are the programming interfaces used to control and manage on‑chip hardware peripherals. Analog-to-Digital Converter (ADC) General-Purpose I/O (GPIO) General-Purpose Timer (TIMER) Inter-Integrated Circuit (I2C/IIC) Serial Flash Controller (SPIFLASH) Universal Asynchronous Receiver/Transmitter (UART) Pulse Width Modulation (PWM) Inter-IC Sound (I2S) Multimedia Audio CODEC (CODEC)