Overview
The ST72F621L4M1 is a low-speed USB 8-bit microcontroller (MCU) from STMicroelectronics, designed for applications requiring USB connectivity. It is part of the ST7 microcontroller family and is particularly suited for devices that need to interface with USB hosts. This MCU features a robust set of peripherals and power management options, making it versatile for various embedded system applications.
Key Specifications
| Specification | Details |
|---|---|
| Program Memory | 16 Kbytes (FLASH) |
| Data RAM | 768 bytes (128-byte stack) |
| Package | 34-pin SOIC |
| Maximum Clock Frequency | 12 MHz |
| ADC Resolution | 10 bits |
| Number of I/Os | 23 |
| Operating Supply Voltage | 4.0V to 5.5V (Low voltage 3.0V to 5.5V for ROM versions) |
| Operating Temperature | 0°C to +70°C |
| USB Interface | Low speed, 3 endpoints, DMA, Suspend and Resume operations |
| Timers | Configurable watchdog timer, 8-bit Auto Reload Timer (ART), 8-bit Time Base Unit (TBU) |
| Communications Interfaces | Asynchronous Serial Communication Interface (SCI), Synchronous Serial Peripheral Interface (SPI) |
Key Features
- Memories: 16 Kbytes of FLASH memory with read-write protection, In-Application and In-Circuit Programming for FLASH versions.
- USB Interface: Compliant with USB specification version 2.0, low speed, 3 endpoints, DMA, integrated 3.3V voltage regulator and transceivers, Suspend and Resume operations.
- Timers and Watchdog: Configurable watchdog timer (8 to 500 ms timeout), 8-bit Auto Reload Timer (ART) with 2 Input Captures and 2 PWM outputs, 8-bit Time Base Unit (TBU).
- Analog Peripheral: 10-bit A/D Converter with up to 8 input pins.
- Power Management: Enhanced Reset System, Low Voltage Detector (LVD), 3 Power saving modes.
- I/O Ports: Up to 31 multifunctional bidirectional I/O lines, up to 12 External interrupts, 13 alternate function lines, 8 high sink outputs, 2 true open drain pins.
- Instruction Set: 8-bit data manipulation, 63 basic instructions, 17 main addressing modes, 8 x 8 unsigned multiply instruction, true bit manipulation.
Applications
The ST72F621L4M1 is suitable for a variety of applications that require low-speed USB connectivity, such as:
- USB peripherals like keyboards, mice, and other human interface devices.
- Industrial control systems and automation.
- Medical devices requiring USB interface.
- Consumer electronics such as printers, scanners, and other USB-connected devices.
Q & A
- What is the program memory size of the ST72F621L4M1?
The program memory size is 16 Kbytes (FLASH). - What is the maximum clock frequency of the ST72F621L4M1?
The maximum clock frequency is 12 MHz. - How many I/O ports does the ST72F621L4M1 have?
The ST72F621L4M1 has up to 23 I/O ports. - What is the resolution of the A/D Converter in the ST72F621L4M1?
The A/D Converter has a resolution of 10 bits. - Does the ST72F621L4M1 support In-Circuit Programming?
Yes, the ST72F621L4M1 supports In-Circuit Programming for FLASH versions. - What are the power saving modes available in the ST72F621L4M1?
The ST72F621L4M1 has 3 Power saving modes. - What is the operating supply voltage range for the ST72F621L4M1?
The operating supply voltage range is 4.0V to 5.5V (Low voltage 3.0V to 5.5V for ROM versions). - What communications interfaces are available on the ST72F621L4M1?
The ST72F621L4M1 features Asynchronous Serial Communication Interface (SCI) and Synchronous Serial Peripheral Interface (SPI). - Does the ST72F621L4M1 have a watchdog timer?
Yes, the ST72F621L4M1 has a configurable watchdog timer (8 to 500 ms timeout). - What is the package type of the ST72F621L4M1?
The package type is 34-pin SOIC.
