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| Part Number | EFM32GG840F512-QFN64 | EFM32GG940F512-QFN64 | EFM32GG840F512-QFN64T | 
|---|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | Silicon Labs | 
| Product Status | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | 
| Core Processor | ARM® Cortex®-M3 | ARM® Cortex®-M3 | ARM® Cortex®-M3 | 
| Core Size | 32-Bit Single-Core | 32-Bit Single-Core | 32-Bit Single-Core | 
| Speed | 48MHz | 48MHz | 48MHz | 
| Connectivity | I²C, IrDA, SmartCard, SPI, UART/USART | I²C, IrDA, SmartCard, SPI, UART/USART | I²C, IrDA, SmartCard, SPI, UART/USART | 
| Peripherals | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT | 
| Number of I/O | 56 | 53 | 56 | 
| Program Memory Size | 512KB (512K x 8) | 512KB (512K x 8) | 512KB (512K x 8) | 
| Program Memory Type | Flash | Flash | Flash | 
| EEPROM Size | - | - | - | 
| RAM Size | 128K x 8 | 128K x 8 | 128K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 1.85V ~ 3.8V | 1.85V ~ 3.8V | 1.85V ~ 3.8V | 
| Data Converters | A/D 8x12b; D/A 2x12b | A/D 8x12b; D/A 2x12b | A/D 8x12b; D/A 2x12b | 
| Oscillator Type | Internal | Internal | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | 
| Package / Case | 64-VFQFN Exposed Pad | 64-VFQFN Exposed Pad | 64-VFQFN Exposed Pad | 
| Supplier Device Package | 64-QFN (9x9) | 64-QFN (9x9) | 64-QFN (9x9) |