PSoC1 CY8C29866-24AXI — 8-bit MCU with configurable analog and digital blocks
The Cypress CY8C29866-24AXI is an 8-bit PSoC1 microcontroller from the CY8C29xxx family, built around the M8C core running at 24 MHz. It carries 32 KB of Flash program memory and 2K x 8 of SRAM, with 64 general-purpose I/O lines brought out to a 100-pin LQFP package (100-TQFP, 14x14 mm). The part integrates a 12-channel 14-bit ADC and a 4-channel 9-bit DAC, plus a set of programmable digital and analog blocks that let you configure peripherals like counters, timers, PWMs, and filters without external glue logic.
The 32 KB Flash is the firmware budget; if your application requires over-the-air updates or a large protocol stack, you will need to compress or move to a higher-density sibling. The 2K x 8 SRAM is tight — watch your stack and global variable usage, especially if you are using the USB or multiple serial buffers. The 14-bit ADC gives you 14-bit resolution across 12 multiplexed channels, which is adequate for most sensor-conditioning tasks; the 9-bit DAC is useful for generating analog setpoints or driving simple analog outputs.