48 MHz Cortex-M0+ — what the clock buys you on the BOM line
The NXP MKL17Z64VDA4R is a 32-bit ARM Cortex-M0+ MCU from the Kinetis KL1 series, clocked at 48 MHz with 64 KB Flash and 16 KB RAM. The 32 I/O map onto a 36-ball XFBGA package.
Package reality: 36-XFBGA 3.5×3.5 mm
The 36-ball XFBGA (3.5×3.5 mm) is a fine-pitch BGA. It saves board area but demands a controlled-impedance PCB stack with microvias and solder-paste inspection. This is not a hand-solderable package; plan for reflow assembly and X-ray inspection. The Tape & Reel delivery suits automated pick-and-place.
Mixed-signal and connectivity
The 15-channel 16-bit ADC handles multi-sensor acquisition — temperature, current shunt, strain gauge — without an external converter. FlexIO can emulate UART, SPI, I²C, or custom serial protocols, giving you protocol flexibility without a dedicated peripheral pin. DMA offloads the Cortex-M0+ for periodic data moves.