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Espressif ESP8266 WiFi-serial interface

Espressif ESP8266 WiFi-serial interface : weekend die-shot blog posting shows what is inside ESP8266 WiFi IoT chip. Die size 2050×2169 µm, half of which is occupied by transceiver and PA, 25% – on-chip memory (rough size estimations are ~300KiB), and the rest is Xtensa LX106 CPU core and other digital logic. Chip has marking ESP8089,