70 MHz ARM7 — what the core speed buys you
The LPC2103FBD48EL runs the ARM7 core at 70 MHz, handling control-loop and protocol-processing tasks.
Memory budget — 32 KB Flash, 8 KB SRAM
Program memory is 32 KB of on-chip Flash, organized as 32K × 8. That holds a moderate firmware image — a Modbus RTU stack plus a PID loop, or a simple HMI front-end with a few screens of lookup tables. The 8 KB SRAM is the runtime workspace; it limits the size of data buffers, so if your application queues many CAN or UART messages, check the worst-case stack depth and buffer allocation against this 8 KB ceiling. The part has no external bus, so the firmware and data must fit entirely on-chip.
Supply range is 1.65 V to 1.95 V.
On-chip peripherals and I/O
The part integrates an 8-channel, 10-bit SAR ADC for direct sensor readout. Serial connectivity covers I²C, SPI, SSI, SSP, and UART/USART.