Download the EFM32ZG222F32 datasheet PDF.
This datasheet also includes the EFM32ZG222F4 variant, as both parts are published together in a single manufacturer document.
Preliminary ...the world's most energy friendly microcontrollers EFM32ZG222 DATASHEET
F32/F16/F8/F4 Preliminary • ARM Cortex-M0+ CPU platform • High Performance 32-bit processor @ up to 24 MHz •.