Download the EFM32GG232F1024 datasheet PDF.
This datasheet also includes the EFM32GG232F512 variant, as both parts are published together in a single manufacturer document.
Preliminary ...the world's most energy friendly microcontrollers EFM32GG232 DATASHEET
F1024/F512 Preliminary • ARM Cortex-M3 CPU platform • High Performance 32-bit processor @ up to 48 MHz • Memory.