1. Core and Performance Generational Gap EFM32LG: Based on ARM Cortex‑M3 core, 48 MHz operating frequency. EFM32GG‑A: Based on ARM Cortex‑M4 core (integrated DSP instructions and single‑precision FPU), 72 MHz operating frequency. The latter offers generational advantages in digital signal processing, mathematical operations, and execution efficiency of complex algorithms, making it suitable for applications with higher computational demands. However, it must be evaluated whether software (e.g., DSP libraries, floating‑point operations) requires adaptation or rewriting. 2. Memory Resources and Expansion Capability EFM32LG: 128 KB Flash, 32 KB RAM. EFM32GG‑A: 512 KB Flash, 192 KB RAM. The replacement provides resource headroom for more complex application logic, larger protocol stacks, or file systems, or can extend the functional lifecycle of the original application. This constitutes a direct hardware resource upgrade. 3. Peripheral Module Configuration and Updates EFM32GG‑A adds: CANbus, LINbus, MMC/SD/SDIO, PDM interface, and enhanced QSPI support. EFM32LG exclusive: I2S audio interface. The replacement strengthens automotive/industrial network connectivity (CAN/LIN) and high‑capacity storage expansion, but loses the native digital audio interface (I2S). If the original design uses I2S, the substitution would require an external codec or software emulation, increasing complexity and cost. 4. Analog Front‑End Configuration EFM32LG: 8‑channel 12‑bit SAR ADC. EFM32GG‑A: 16‑channel 12‑bit SAR ADC. The replacement supports simultaneous or sequential sampling of more analog signal sources, offering potential system simplification for applications requiring multi‑channel data acquisition. 5. Power Supply and Energy Consumption Characteristics Both share similar voltage ranges, but the EFM32GG‑A reduces the minimum operating voltage to 1.8 V. The replacement offers broader applicability in low‑power designs; however, attention should be paid to re‑verifying system timing and analog performance when operating near 1.8 V.