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| Part Number | EFM32HG321F32G-A-QFP48 | EFM32HG322F32G-A-QFP48 | EFM32HG321F32G-A-QFP48R | EFM32HG321F32G-B-QFP48 | 
|---|---|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | 
| Product Status | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | Discontinued at Digi-Key | 
| Core Processor | ARM® Cortex®-M0+ | ARM® Cortex®-M0+ | ARM® Cortex®-M0+ | ARM® Cortex®-M0+ | 
| Core Size | 32-Bit Single-Core | 32-Bit Single-Core | 32-Bit Single-Core | 32-Bit Single-Core | 
| Speed | 25MHz | 25MHz | 25MHz | 25MHz | 
| Connectivity | I²C, IrDA, SmartCard, SPI, UART/USART, USB | I²C, IrDA, SmartCard, SPI, UART/USART, USB | I²C, IrDA, SmartCard, SPI, UART/USART, USB | I²C, IrDA, SmartCard, SPI, UART/USART, USB | 
| Peripherals | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT | 
| Number of I/O | 35 | 35 | 35 | 35 | 
| Program Memory Size | 32KB (32K x 8) | 32KB (32K x 8) | 32KB (32K x 8) | 32KB (32K x 8) | 
| Program Memory Type | Flash | Flash | Flash | Flash | 
| EEPROM Size | - | - | - | - | 
| RAM Size | 8K x 8 | 8K x 8 | 8K x 8 | 8K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 1.98V ~ 3.8V | 1.98V ~ 3.8V | 1.98V ~ 3.8V | 1.98V ~ 3.8V | 
| Data Converters | A/D 4x12b | A/D 4x12b | A/D 4x12b | A/D 4x12b | 
| Oscillator Type | Internal | Internal | Internal | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | 
| Package / Case | 48-TQFP | 48-TQFP | 48-TQFP | 48-TQFP | 
| Supplier Device Package | 48-TQFP (7x7) | 48-TQFP (7x7) | 48-TQFP (7x7) | 48-TQFP (7x7) |