Texas Instruments Stellaris ARM Cortex-M3S 1000 series 32-bit MCU, LM3S1P51-IQC80-C3, 80MHz, 64KB Flash, 24KB RAM, 100-LQFP, -40 to 85°C.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 1000 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.08V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 80MHz |
| Package | Tray |
| RAM size | 24K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT |
| Connectivity | I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART |
| Number of i (O) | 67 |
| Core processor | ARM® Cortex®-M3 |
| Case | 100-LQFP |
| Data converters | A/D 16x10b |
| Program memory size | 64KB (64K x 8) |
The LM3S1P51-IQC80-C3: With 67 general-purpose I/O lines and a 16-channel 10-bit ADC, the part suits sensor-rich control and monitoring tasks. On-chip peripherals include PWM, DMA, I²S, and a quadrature encoder interface (QEI) for motor position feedback. Connectivity covers I²C, SPI, SSI, UART/USART, IrDA, and Microwire — enough serial interfaces to link multiple field devices or a host controller without external bridge chips.
Texas Instruments lists the LM3S1P51-IQC80-C3 as obsolete.
A board-level redesign is required for any alternative MCU. The functional replacement would need to match the Cortex-M3 core, 80 MHz speed, 64 KB flash, 24 KB RAM, and 100-LQFP footprint — a parametric search against the Stellaris family is the starting point.