NXP LPC11Uxx series 32-bit ARM Cortex-M0 MCU, 50 MHz, 48 KB Flash, 10 KB RAM, 4 KB EEPROM, USB 2.0, 26 I/O, -40°C to 85°C, 32-HVQFN package.
| Parameter | Value |
|---|---|
| Series | LPC11Uxx |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 50MHz |
| Package | Bulk |
| RAM size | 10K x 8 |
| Core size | 32-Bit Single-Core |
| EEPROM size | 4K x 8 |
| Peripherals | Brown-out Detect/Reset, POR, WDT |
| Connectivity | I²C, Microwire, SmartCard, SPI, SSP, UART/USART, USB |
| Number of i (O) | 26 |
| Core processor | ARM® Cortex®-M0 |
| Case | 32-VQFN Exposed Pad |
| Data converters | A/D 8x10b |
| Program memory size | 48KB (48K x 8) |
The LPC11U34FHN33/421551: 50 MHz core clock handles USB interrupt-driven bulk transfer alongside UART polling loop without dropping bytes.
48 KB Flash and 10 KB RAM partition for USB-capable MCU. 4 KB EEPROM separate array for calibration constants.
Within the LPC11Uxx family, pin-compatible variants with different Flash/RAM densities exist (e.g., LPC11U24 with 32 KB Flash, LPC11U37 with 64 KB Flash). The 32-HVQFN footprint is shared across the series, so a density swap is a firmware recompile, not a board respin.
The core runs at 50 MHz, which is the maximum clock for this Cortex-M0 device.