Specifications: 1. Core: Xtensa* dual-core 32-bit LX7 CPU, frequency up to 240MHz 2. Memories: 384 KB of ROM 512 KB of SRAM 16 KB of RTCSRAM 8 MB of PSRAM 3. Working Voltage: 3V to 3.6V 4. Up to 45 GPIOs 5. 2*12-bit ADC (up to 20 channels) 6. Communication interfaces 2 I2C interfaces 2 I25 interface 4 SPI interfaces 3 UART interfaces 1 USB OTG interface 7. Security: 4096 bit OTP AES, SHA, RSA, ECC, RNG Secure Boot, Flash Encryption, Digital signature, HMAC module 8. Extended temperature range: -40 to 65°C