This document describes the features and characteristics of the ST72101/ST72212/ST72213 8-bit MCU chip, including the storage capacity of ROM/OTP/EPROM, the capacity of RAM, ADC, WDG, SPI, and timers.
The document details the ST72101, ST72213, and ST72212 HCMOS Microcontroller Units. These devices are based on an industry-standard 8-bit core and feature an enhanced instruction set with true bit manipulation and indirect addressing modes. They normally operate at a 16MHz oscillator frequency but can be placed in WAIT, SLOW, or HALT modes under software control to reduce power consumption.
The microcontrollers include on-chip peripherals such as an Analog-to-Digital Converter (ADC) for specific models, a synchronous SPI serial interface, a digital Watchdog timer, and one or two independent 16-bit Timers. The devices also feature 22 multifunctional bidirectional I/O lines with programmable interrupt inputs.
| User Program Memory | 4 to 8K bytes |
|---|---|
| Data RAM | 256 bytes, including 64 bytes of stack |
| I/O Lines | 22 multifunctional bidirectional I/O lines |
| Timers | One or two 16-bit Timers |
| ADC Channels | 8-bit Analog-to-Digital converter (6 channels) |
| Operating Supply Voltage | 3 to 5.5V |
| CPU Frequency | 8MHz max (16MHz oscillator) |
| Temperature Range | -40°C to +125°C |
The devices normally operate at a 16MHz oscillator frequency, with a maximum CPU frequency of 8MHz.
The ADC is included only in the ST72212 and ST72213 models.
The devices can be placed in WAIT, SLOW, or HALT modes under software control.