![]() The PY32F030 further builds on that with up to a 48 MHz clock, even more peripherals (2x SPI, 2x USART…), a PLL, and an LED display controller. The PY32F003 family adds DMA, up to 8KB SRAM, up to 64KB flash, a wider range of peripherals, a few more timers, and can run at up to 32 MHz, but somehow lacks the HSE interface for an external crystal oscillator. ![]() 4~24MHz HSE (External crystal oscillator).1x low-power timer (LPTIM) to support wake-up from stop mode.MCU Core – 32-bit Arm Cortex-M0+ 24 MHz.PY32F002A key features and specifications: ![]() There are three PY32 sub-families, but let’s check out the PY32F002 family in detail since those are the cheapest parts. The Puya PY32 microcontrollers are in the same price range but offer a 32-bit Arm Cortex-M0+ core clocked at 24 to 48MHz, 16KB to 64KB flash storage, and 2KB to 8KB SRAM. However, both are 8-bit microcontrollers that come with OTG (One-Time Programming) ROM, meaning they can’t be easily used for development or updated. Puya Semiconductor (Shanghai) PY32 Arm Cortex-M0+ microcontroller family may be the world’s cheapest 32-bit Arm MCUs with one of the parts – PY32F002AL15S6TU – selling for under 8 cents per unit in 5K+ orders with 3KB SRAM, 20KB flash in an 8-pin SOP-8 package.īack in 2016, when I searched for the world’s cheapest MCU, I found Holtek HT48R002 8-bit microcontroller, and a few years later (2019), Padauk PMS150C “3 Cents” MCU came to my attention.
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