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| PartNumber | EFM32HG321F32G-B-QFP48 | EFM32HG321F32G-A-QFP48 | EFM32HG321F32G-A-QFP48R |
| Description | ARM Microcontrollers - MCU ARM Cortex-M0+ 32-bit 25 MHz 32 kB USB MCU | ARM Microcontrollers - MCU 32k Flash 8k RAM USB ADC | ARM Microcontrollers - MCU 32k Flash 8k RAM USB ADC |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories |
| Product Category | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TQFP-48 | TQFP-48 | TQFP-48 |
| Series | EFM32HG | EFM32HG | EFM32HG |
| Core | ARM Cortex M0+ | ARM Cortex M0+ | ARM Cortex M0+ |
| Data Bus Width | 32 bit | 32 bit | 32 bit |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz |
| Program Memory Size | 32 kB | 32 kB | 32 kB |
| Data RAM Size | 8 kB | 8 kB | 8 kB |
| ADC Resolution | 12 bit | 12 bit | 12 bit |
| Number of I/Os | 35 I/O | 35 I/O | 35 I/O |
| Operating Supply Voltage | 1.98 V to 3.8 V | 3 V | 3 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Data RAM Type | SRAM | RAM | RAM |
| Interface Type | I2C, SPI, UART | I2C, SPI, UART, USB | I2C, SPI, UART, USB |
| Analog Supply Voltage | 1.98 V to 3.8 V | - | - |
| I/O Voltage | 3.3 V | 3 V | 3 V |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of Timers/Counters | 3 x 16 bit | 3 x 16 bit | 3 x 16 bit |
| Processor Series | EFM32HG321 | EFM32HG321 | EFM32HG321 |
| Product Type | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU | ARM Microcontrollers - MCU |
| Factory Pack Quantity | 250 | 250 | 1000 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 3.8 V | 3.8 V | 3.8 V |
| Supply Voltage Min | 1.98 V | 1.98 V | 1.98 V |
| Tradename | EFM32 | EFM32 | EFM32 |
| Watchdog Timers | Watchdog Timer | Watchdog Timer | Watchdog Timer |
| Packaging | - | Tray | Reel |
| Number of ADC Channels | - | 6 Channel | 6 Channel |
| Unit Weight | - | 0.319998 oz | 0.319998 oz |