ST72321BRx, ST72321BARx ST72321BJx, ST72321BKx are 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface.
This document is a technical datasheet for the ST72321 series of 8-bit microcontrollers (MCUs). The devices are available in 64/44-pin packages and feature 32 to 60K bytes of High Density Flash (HDFlash) or ROM, 1K to 2K bytes of RAM, and a 10-bit ADC. Key peripherals include five timers, SPI, SCI, and I2C interfaces, designed for applications requiring low power consumption and robust memory retention.
| Program Memory | 32K to 60K Flash/ROM |
|---|---|
| RAM | 1K to 2K |
| Flash Endurance | 100 cycles |
| Data Retention | 40 years at 85°C |
| Operating Voltage | 3.8V to 5.5V |
| Temperature Range | -40°C to +125°C |
| ADC Resolution | 10-bit |
| Timers | Five |
| I/O Ports | Up to 48 |
Yes, In-Circuit Programming is supported for HDFlash devices.
The microcontroller supports four power saving modes: Halt, Active-Halt, Wait, and Slow.