ARM Cortex-M7 216 MHz · 2MB Flash · 512KB SRAM · Double Precision FPU · UFBGA-176 · Betaflight F7 Target Flight Controller MCU
| Part Number | STM32F765IIK6 |
|---|---|
| Manufacturer | STMicroelectronics |
| Core | ARM Cortex-M7 with Double Precision FPU |
| Max Frequency | 216 MHz |
| Flash Memory | 2 MB dual-bank (2,097,152 bytes) |
| SRAM | 512 KB (includes 128KB DTCM + 16KB ITCM + 4KB backup) |
| Package | UFBGA-176 (10×10mm, 0.65mm pitch) |
| Supply Voltage | 1.7 V – 3.6 V |
| Operating Temperature | −40°C to +85°C (Industrial) |
| GPIO Pins | 140 (5V tolerant I/O) |
| DSP Extensions | Single-cycle MAC, SIMD, saturation arithmetic |
| RoHS Compliant | Yes |
| L1 Cache | 4KB I-cache + 4KB D-cache |
| Supply Voltage (VDD) | 1.7 V – 3.6 V |
|---|---|
| Supply Voltage (VBAT) | 1.65 V – 3.6 V |
| I/O Voltage | 3.3 V (5V tolerant on most pins) |
| Max Current (I/O pin) | 20 mA per pin |
| Run Mode Current (216MHz) | ~180 mA typical (Please confirm with manufacturer datasheet) |
| Stop Mode Current | ~120 µA (Please confirm with manufacturer datasheet) |
| Standby Mode Current | ~2.8 µA (Please confirm with manufacturer datasheet) |
| ADC Resolution | 12-bit, 3× ADC, 24 channels |
| DAC | 12-bit, 2× DAC |
| Timers | 2× advanced, 12× general purpose, 2× basic |
| UART / USART | 8× (up to 27 Mbit/s) |
|---|---|
| SPI | 6× SPI (up to 50 Mbit/s) |
| I²C | 4× I²C (Fast mode Plus, 1 MHz) |
| USB OTG | 1× USB 2.0 FS + 1× USB 2.0 HS with ULPI |
| CAN | 3× CAN 2.0B (Please confirm with manufacturer datasheet) |
| SDIO | 1× (for SD/MMC cards) |
| DMA | 2× DMA controllers, 8 streams each |
| Ethernet MAC | 10/100 Mbit/s with dedicated DMA |
| DCMI | 1× Digital Camera Interface |
| FMC | Flexible Memory Controller (SRAM/PSRAM/NOR/NAND/SDRAM) |
| Part Number | STM32F765IIK6 |
|---|---|
| Orderable Qty | 1 pcs – 10,000+ pcs |
| Price (1–9 pcs) | Contact for quote |
| Price (10–99 pcs) | Contact for quote |
| Price (100–499 pcs) | Contact for quote |
| Price (500+ pcs) | Best pricing available |
| Lead Time (stock) | 3–7 business days |
| Packaging | Tray (BGA) |
| Export Control | EAR99 (No license required) |
The STM32F765IIK6 is a high-performance ARM Cortex-M7 microcontroller from STMicroelectronics, operating at up to 216 MHz with a double-precision (FPv5) floating-point unit and full DSP instruction set with single-cycle MAC. It features 2MB of dual-bank Flash memory and an impressive 512KB of SRAM, including 128KB of Data Tightly Coupled Memory (DTCM) and 16KB of Instruction TCM for zero-wait-state access to critical routines. Packaged in UFBGA-176 (10×10mm), this chip is one of the premier Betaflight F7 targets, widely deployed in high-end racing and freestyle drone flight controllers.
The Cortex-M7 core represents a significant architectural leap over the Cortex-M4: a 6-stage superscalar pipeline with branch prediction, dual-issue capability, and integrated L1 cache (4KB I-cache + 4KB D-cache) deliver roughly twice the per-MHz performance of the M4. The double-precision FPU handles 64-bit floating-point operations natively — crucial for advanced attitude estimation algorithms like quaternion-based Extended Kalman Filters where numerical precision directly affects navigation accuracy. The 216 MHz clock combined with the M7's IPC advantages makes the F765 roughly 2.5× faster than the F405 at similar clock speeds.
In Betaflight, the STM32F765IIK6 enables 8 kHz gyro/PID loop rates with significant CPU headroom remaining for dynamic filtering, RPM filtering via bidirectional DShot, and real-time blackbox logging. The generous 512KB of SRAM allows full-featured firmware builds with all optimization flags enabled. Popular F7 flight controllers built around this chip include the Kakute F7, Matek F765, and various AIO F7 boards. For professional drone developers, the F765 also provides Ethernet MAC support for companion computer integration and an FMC controller supporting SDRAM for AI/vision payloads.
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