Obsolete — the sourcing reality for this Stellaris MCU
The LM3S1F11-IBZ80-A2T: For a BOM line that already carries this part, the supply path runs through independent distribution. Stock is confirmed at RFQ; quantities are lot-specific and date-code traceable.
80 MHz Cortex-M3 — what the core delivers
The ARM Cortex-M3 core runs at 80 MHz — a 32-bit single-core pipeline with hardware divide and single-cycle multiply. This sets the throughput ceiling for the application; the actual instruction execution rate depends on flash wait states and bus contention from the DMA controller. On-chip memory comprises 384 KB of flash for program storage and 48 KB of SRAM for data. The flash is large enough for a full protocol stack plus application logic; the SRAM budget of 48 KB constrains the runtime heap and stack depth, particularly with multiple active communication buffers.
Peripheral set and analog acquisition
The part integrates 67 general-purpose I/O lines, a suite of serial interfaces including I²C, SPI, SSI, UART/USART, IrDA, LIN, and Microwire, plus an external bus interface (EBI/EMI) for memory-mapped peripherals. The 8-channel 12-bit ADC provides analog input for multi-sensor acquisition without an external converter. On-chip peripherals include brown-out detection, power-on reset, a PWM module, a watchdog timer, and a DMA controller — enough to offload data movement from the core without an external CPLD or FPGA.
Package, supply, and temperature grade
Housed in a 108-ball LFBGA (10x10 mm body), the 0.80 mm pitch BGA demands a multi-layer PCB for fan-out — a two-layer board will not break out the inner balls. The supplier device package is 108-BGA (10x10).