1. Overview ................................................................................................................................1
1.1. Wi-Fi Key Features! ".....................................................................................................................1
1.2. Specifications! ".............................................................................................................................2
1.3. Applications! "...............................................................................................................................3
2. Pin Definitions ........................................................................................................................4
3. Functional Description ..........................................................................................................7
3.1. CPU, Memory, and Flash! "...........................................................................................................7
3.1.1. CPU! "...............................................................................................................................7
3.1.2. Memory! "..........................................................................................................................7
3.1.3. External Flash! "................................................................................................................8
3.2. Clock! "..........................................................................................................................................8
3.2.1. High Frequency Clock! "...................................................................................................8
3.2.2. External Clock Requirements! "........................................................................................9
3.3. Radio! "..........................................................................................................................................9
3.3.1. Channel Frequencies! ".....................................................................................................9
3.3.2. 2.4 GHz Receiver! ".........................................................................................................10
3.3.3. 2.4 GHz Transmitter! ".....................................................................................................10
3.3.4. Clock Generator! "..........................................................................................................10
3.4. Wi-Fi! ".........................................................................................................................................10
3.4.1. Wi-Fi Radio and Baseband! "..........................................................................................11
3.4.2. Wi-Fi MAC! "...................................................................................................................11
3.5. Power Management! ".................................................................................................................11
4. Peripheral Interface .............................................................................................................13
4.1. General Purpose Input/Output Interface (GPIO)! "......................................................................13
4.2. Secure Digital Input/Output Interface (SDIO)! "...........................................................................13
4.3. Serial Peripheral Interface (SPI/HSPI)! "......................................................................................14
4.3.1. General SPI (Master/Slave)! "..........................................................................................14
4.3.2. HSPI (Master/Slave)! ".....................................................................................................14
4.4. I2C Interface! ".............................................................................................................................15
4.5. I2S Interface! ".............................................................................................................................15
4.6. Universal Asynchronous Receiver Transmitter (UART)! "............................................................15
4.7. Pulse-Width Modulation (PWM)! "...............................................................................................16
4.8. IR Remote Control! "....................................................................................................................17
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