The LPC1114LVFHN24/103: 32-bit ARM Cortex-M0 MCU from the LPC1100LV low-voltage series. Runs at 50 MHz with 32 KB Flash and 4 KB SRAM, operates on 1.65 V to 1.95 V supply, 24-HVQFN package with 20 I/O. Includes 8-channel 8-bit ADC, internal oscillator, I²C/SPI/UART/USART.
Memory and I/O budget
32 KB Flash and 4 KB SRAM limit firmware to small control stacks or a single communication protocol. The 20 I/O are enough for a keypad matrix, a few LED indicators, and a serial interface. The 8-bit ADC is coarse — fine for battery monitoring or a potentiometer input, not for precision measurement. Plan the firmware size and data buffer before committing the BOM line.