ST72321Rx/ST72321ARx/ST72321Jx is a 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface
The ST72321Rx, ST72321ARx and ST72321Jx are ST7 family 8-bit microcontrollers with 32K to 60K Flash/ROM program memory and 1K to 2K RAM. The document describes the devices, pinout, memory map, CPU, reset and clock management, interrupts, power saving modes, I/O ports, on-chip peripherals and instruction set.
It also provides electrical characteristics, package mechanical data, device configuration and ordering information, development tools and known limitations. The device summary lists 60K, 48K and 32K Flash/ROM versions, operating voltage from 3.8 to 5.5 V, temperature ranges of -40 to +125°C and -40 to +85°C, and LQFP64 and LQFP44 packages.
| Program memory | 32K to 60K dual voltage High Density Flash or ROM |
|---|---|
| RAM | 1K to 2K |
| Operating voltage | 3.8 to 5.5 V |
| Temperature range | -40 to +125°C, -40 to +85°C |
| I/O ports | Up to 48 |
| Timers | 5 timers |
| ADC | 10-bit ADC with up to 16 input ports |
| Packages | LQFP64 14x14 (R), LQFP64 10x10 (AR), LQFP44 10x10 (J) |
The devices offer 32K to 60K dual voltage High Density Flash or ROM.
The listed operating voltage is 3.8 to 5.5 V.
Yes, the device includes an SPI synchronous serial interface.
The device summary lists LQFP64 14x14 (R), LQFP64 10x10 (AR) and LQFP44 10x10 (J) packages.