ST72E121 ST72T121 is an 8-bit MCU with 8 to 16K OTP/EPROM, 384 to 512 bytes of RAM, WDG, SCI, SPI and 2 timers.
The document details the ST72E121 and ST72T121 HCMOS Microcontroller Units (MCUs), which are members of the ST7 family. These devices operate at a maximum frequency of 8 MHz (with a 16 MHz oscillator) and feature an enhanced instruction set including true bit manipulation and indirect addressing modes.
Key specifications include program memory ranging from 8 to 16K bytes, data RAM between 384 to 512 bytes, and operating supply voltages of 3 to 5.5V. The microcontrollers support various power-saving modes such as Wait, Slow, and Halt, and are available in TQFP44 and SDIP42 packages.
| Program Memory | 8 to 16K bytes |
|---|---|
| Data RAM | 384 to 512 bytes |
| Operating Supply Voltage | 3 to 5.5V |
| CPU Frequency | 8MHz max (16MHz oscillator) |
| Temperature Range | -40°C to +125°C |
| I/O Lines | 32 multifunctional bidirectional I/O lines |
The devices are available in TQFP44 and SDIP42 packages.
Yes, it includes a Software or Hardware Watchdog (WDG).