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ST72F321BR9T6 from ST,ST,ST Microelectronics

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ST72F321BR9T6

Manufacturer: ST,ST, STM

64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface

Partnumber Manufacturer Quantity Availability
ST72F321BR9T6 ST,ST, STM 21880 In Stock

Description and Introduction

64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface The ST72F321BR9T6 is a microcontroller from STMicroelectronics (STM) based on the ST7 core. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Core:** ST7 8-bit microcontroller  
- **Operating Frequency:** Up to 8 MHz  
- **Program Memory (Flash):** 32 KB  
- **RAM:** 1 KB  
- **EEPROM:** 1 KB  
- **I/O Pins:** Up to 38  
- **Timers:**  
  - 16-bit timer with 2 channels (PWM, input capture, output compare)  
  - 8-bit timer with prescaler  
- **Communication Interfaces:**  
  - SPI (Serial Peripheral Interface)  
  - SCI (Serial Communication Interface)  
  - I²C (Inter-Integrated Circuit)  
- **ADC:** 10-bit, 8-channel  
- **Operating Voltage:** 3.0V to 5.5V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** LQFP48  

### **Descriptions:**
- The ST72F321BR9T6 is designed for embedded applications requiring moderate processing power and low power consumption.  
- It features an on-chip debug module for easy debugging and development.  
- The microcontroller is suitable for industrial, automotive, and consumer applications.  

### **Features:**
- **Low Power Modes:** Halt and Wait modes for power saving.  
- **Watchdog Timer:** Independent hardware watchdog for system reliability.  
- **Interrupt Handling:** Nested interrupt controller with multiple priority levels.  
- **On-Chip Oscillator:** Internal RC oscillator for clock generation.  
- **Robust Design:** High immunity to noise and ESD protection.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface

Alternative Part Number

  • STM8S208RBT6 --: ST 8-bit MCU in the same 64-pin LQFP package with comparable Flash and peripherals; a natural migration path from the ST72F series.
  • STM32F103RBT6 --: ARM Cortex-M3 MCU in the same 64-pin LQFP footprint with 128KB Flash, offering higher performance and a well-supported upgrade path.
  • MC9S08DZ60MLH --: 8-bit S08 MCU in a 64-pin LQFP package with similar Flash and integrated CAN, suitable as a cross-vendor functional alternative.
  • AT89C51RB2-RLT --: Independent 8051-core MCU in 44-pin LQFP with comparable flash and I/O, usable as a cross-vendor alternative where the ST72F321BR9T6 supply is unavailable.

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