32-bit ARM Cortex-M0+ Microcontroller – PY32C642

The PY32C642 series microcontroller adopts a high-performance 32-bit ARM® Cortex®-M0+ core, with a wide voltage operating range of MCU. It integrates 24Kbytes Flash and 3Kbytes SRAM memory, with a maximum operating frequency of 24 MHz. It includes various product types with different package types.

1 channel 12-bit ADC

2 16-bit timers

and 2 comparators

The operating temperature range of the PY32C642 series microcontroller is -40°C ~ 85°C, and the operating voltage range is 1.7 V ~ 5.5 V. The chip provides sleep/stop low-power operating modes to meet various low-power applications.

The PY32C642 series microcontroller is suitable for various application scenarios, such as controllers, handheld devices, e-cigarettes, PC peripherals, gaming and GPS platforms, industrial applications, etc. Most importantly, it is used in the e-cigarette field. It is highly adaptable and has a large supply, and mass production has already begun.

Core

— 32-bit ARM® Cortex® – M0+

— Maximum 24 MHz operating frequency

Memory

— 24 Kbytes Flash memory

— 3 Kbytes SRAM

Clock System

— Internal 24 MHz RC oscillator (HSI)

— Internal 32.768 KHz RC oscillator (LSI)

— 32.768 KHz low-speed crystal oscillator (LSE)

— External clock input

Power Management and Reset

— Operating voltage: 1.7 V ~ 5.5 V

— Low power mode: Sleep/Stop

— Power-on/power-down reset (POR/PDR)

— Brown-out reset (BOR)

General Input/Output (I/O)

— Up to 18 I/O, all can be used as external interrupts

— Drive current 8 mA

1 x 12-bit ADC

— Supports up to 8 external input channels, 2 internal channels

— VADC-REF internal 1.5 V, VCC

Timer

— 1 16-bit advanced control timer (TIM1)

— 1 general 16-bit timer (TIM14)

— 1 low-power timer (LPTIM), supports wake-up from stop mode

Watchdog Timer

— 1 independent watchdog timer (IWDT)

— 1 SysTick timer

Hardware CRC-32 Module

2 Comparators

Unique UID

Serial wire debug (SWD)

Operating temperature: -40 ~ 85 °C

Package QFN16, QFN20

2.1. Arm® Cortex®-M0+ Core

The Arm® Cortex®-M0+ is an entry-level 32-bit Arm Cortex processor designed for a wide range of embedded applications. It provides significant benefits to developers, including:

· Simple architecture, easy to learn and program

· Ultra-low power consumption, energy-saving operation

· Streamlined code density, etc.

The Cortex-M0+ processor is a 32-bit core optimized for area and power consumption, based on a 2-stage pipeline von Neumann architecture. The processor delivers high-end processing hardware through a streamlined yet powerful instruction set and extensively optimized design, providing the outstanding performance expected from a 32-bit architecture computer, with greater code density than other 8-bit and 16-bit microcontrollers.

The Cortex-M0+ is tightly coupled with a nested vector interrupt controller (NVIC).

2.2. Memory

The chip integrates SRAM. SRAM can be accessed in byte (8-bit), half-word (16-bit), or word (32-bit) modes.

The chip integrates Flash, which consists of 2 different physical areas:

· Main Flash area, which contains applications and user data

· Configurable size Load Flash area for storing customer ISP/IAP bootloader

· Information area, 768 bytes, which includes the following parts:

— Option bytes

— UID bytes

— Factory Configuration bytes

— USER OTP memory

Protection for Flash main memory includes the following mechanisms:

· Write protection (WRP) control to prevent unwanted write operations (due to confusion of program memory pointer PC). The minimum protection unit for write protection is 4 Kbytes.

· Option byte write protection, with a dedicated unlocking design.

2.3. Boot Mode

Two different boot modes can be selected by configuring the bits nBOOT0/nBOOT1 (stored in Option bytes), as shown in the table below:

2.4. Clock System

After the CPU starts, the default system clock frequency is HSI 24 MHz, and the system clock frequency and source can be reconfigured after the program runs. The selectable high-frequency clocks include:

· 24 MHz configurable internal high-precision HSI clock.

· A 32.768 KHz configurable internal LSI clock.

· 4 MHz ~ 32 MHz external input clock

· 32.768 KHz LSE clock

For more details, please refer to the specification.

· E-cigarettes

· Controllers

· Handheld devices

· PC peripherals

· Gaming and GPS platforms

· Industrial applications, etc.