ESP-WROOM-S2 Wireless Wi-Fi Module

This product is NOT for new designs.  The ESP-WROOM-S2 has hardware SPI speeds up to 8 Mbps and includes an ESP8266EX chip that integrates Tensilca L106 32-bit microcontroller (MCU) and a 16-bit RSIC. The system is able to support a Real Time Operating System (RTOS). The CPU clock speed is 80 MHz, but it is capable of reaching a maximum value of 160 MHz. The Wi-Fi stack only takes up about 20% of CPU time, and the remaining CPU time is available for user application. The other parts of the chip are able to work with the MCU through a variety of interfaces: The programmable RAM/ROM interface (iBus) can access the external flash by connecting to the memory controller. The AHB interface can access the register. The Data RAM interface (dBus) connects to the memory controller. The memory controller is integrated within the ESP8266EX Wi-Fi SoC, which includes both SRAM and ROM. The MCU is capable of accessing this memory controller via dBus, iBus, and AHB interfaces. The RAM and ROM unit