The STM32F101TBU6TR is a 32-bit ARM Cortex-M3 microcontroller clocked at 36 MHz with 128 KB of Flash and 16 KB of SRAM.
Lifecycle reality — EOL and what that means for procurement
The STM32F101TBU6TR carries an end-of-life (EOL) status.
Memory sizing and field update strategy
128 KB of Flash and 16 KB of SRAM define the firmware budget. The Flash is large enough for a modest RTOS, a communication stack, and application code; the SRAM handles a few hundred bytes of packet buffers and stack. Field reprogrammability is via the built-in bootloader over UART or I²C — no external programmer needed, but the Flash endurance (typically 10k cycles) means frequent OTA updates are not the intended use case.