Description

The ST72F651AR6T1 is a microcontroller from ST Microelectronics. It is part of the ST7265x MCU series and is designed for volume data exchange with a host device via a full-speed USB interface. This microcontroller supports various transfer protocols, with a focus on mass storage applications. It is compliant with USB Mass Storage Class specifications, including protocols like BOT (Bulk Only Transfer) and CBI (Control, Bulk, Interrupt).

Specifications and features

The ST72F651AR6T1 microcontroller offers the following specifications and features:

• Up to 32K of ROM or High-Density Flash (HDFlash) program memory with read/write protection
• In-Application Programming (IAP) via USB and In-Circuit Programming (ICP) for HDFlash devices
• Up to 5 Kbytes of RAM with up to 256 bytes stack
• PLL for generating 48 MHz USB clock using a 12 MHz crystal
• Low Voltage Reset (except on E suffix devices)
• Dual supply management with analog voltage detector on the USB power line for smart power switching from USB power to battery (on E suffix devices)
• Programmable Internal Voltage Regulator for Memory cards (2.8V to 3.5V) supplying Flash Card I/O lines
• 47 programmable I/O lines, including 15 high sink I/Os, 5 true open drain outputs, and 24 lines programmable as interrupt inputs
• USB Interface with DMA for full-speed bulk applications compliant with USB 12 Mbps specification (version 2.0 compliant)
• On-Chip 3.3V USB voltage regulator and transceivers with software power-down
• 5 USB endpoints: 1 control endpoint, 2 IN endpoints supporting interrupt and bulk, and 2 OUT endpoints supporting interrupt and bulk
• Hardware conversion between USB bulk packets and 512-byte blocks
• Mass Storage Interface with DTC (Data Transfer Coprocessor) supporting various protocol standards
• 2 Timers and Configurable Watchdog for system reliability
• 2 Communication Interfaces: SPI synchronous serial interface and I2C Single Master Interface
• D/A and A/D Peripherals including PWM/BRM Generator and 8-bit A/D Converter with 8 channels
• 8-bit data manipulation with 63 basic instructions, 17 main addressing modes, 8x8 unsigned multiply instruction, and true bit manipulation

Application Scenarios

The ST72F651AR6T1 microcontroller can be used in various applications, including but not limited to:

• Mass storage devices
• Computer peripherals
• Kiosks
• Embedded systems

Comparison

Advantages:

• Suitable for volume data exchange with a host device
• Compliant with USB Mass Storage Class specifications
• Supports various transfer protocols
• Includes a programmable internal voltage regulator for memory cards
• Offers a dual supply management system
• Supports USB interface with DMA for full-speed bulk applications
• Provides hardware conversion between USB bulk packets and 512-byte blocks
• Includes a Mass Storage Interface with support for various protocol standards
• Offers multiple communication interfaces
• Includes D/A and A/D peripherals

Disadvantages:

• Limited program memory (up to 32K)
• May require additional external components for certain applications