Processors:
CPU: Xtensa dual-core (or single-core) 32-bit LX6 microprocessor, operating at 160 or 240 MHz and performing at up to 600 Dhrystone DMIPS
Ultra low power (ULP) co-processor
Memory: 520 KiB SRAM

Wireless connectivity:
Wi-Fi: IEEE 802.11 802.11 b/g/n
Bluetooth: v4.2 BR/EDR and BLE

Peripheral interfaces:
12-bit successive approximation ADC SAR ADC up to 18 channels
2 × 8-bit digital-to-analog converter DACs
10 × touch sensors (capacitive sensing GPIOs)
Temperature sensor
4 × Serial Peripheral Interface Bus SPI
2 × I²S interfaces
2 × I²C interfaces
3 × universal asynchronous receiver/transmitter UART
Secure Digital SD/Secure Digital#SDIO cards SDIO/CE-ATA/MultiMediaCard MMC/MultiMediaCard#eMMC eMMC host controller
SDIO/SPI slave controller
Ethernet MAC interface with dedicated DMA and Precision Time Protocol IEEE 1588 Precision Time Protocol support
CAN bus 2.0
Infrared remote controller (TX/RX, up to 8 channels)
Motor Pulse-width modulation PWM
LED Pulse-width modulation PWM (up to 16 channels)
Hall effect sensor
Ultra low power analog pre-amplifier

Security:
IEEE 802.11 standard security features all supported, including WFA, WPA/WPA2 and WLAN Authentication and Privacy Infrastructure WAPI
Secure boot
Flash encryption
1024-bit OTP, up to 768-bit for customers
Cryptographic hardware acceleration: Advanced Encryption Standard AES, SHA-2, RSA (cryptosystem) RSA, elliptic curve cryptography (ECC), random number generator (RNG)
Power management:
Internal low-dropout regulator
Individual power domain for RTC
5uA deep sleep current
Wake up from GPIO interrupt, timer, ADC measurements, capacitive touch sensor interrupt