ST52T440 Datasheet PDF – 8-bit Intelligent Controller Unit

The ST52T440 is an 8-bit Intelligent Controller Unit (ICU) made by STMicroelectronics, supplied in these packages: DIP, SO 28 Pin, DIP, SO 20 Pin Type. The absolute maximum ratings table on this page lists the 4 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the ST52T440 pinout and maximum ratings, with the full datasheet PDF to preview below or download.

ST52x400/440/441 are 8-bit Intelligent Control Units (ICU) of the ST Five Family, which are able to perform both boolean and fuzzy algorithms in an efficient manner, in order to reach the best performances that the two methodologies allow.

ST52x400/440/441 is produced by STMicroelectronics using the reliable high performance CMOS process, including integrated-on-chip peripherals that allow maximization of system reliability, decreasing system costs and minimizing the number of external components.

The flexible I/O configuration of ST52x400/440/ 441 allows for an interface with a wide range of external devices, like D/A converters or power control devices.

ST52x400/440/441 pins are configurable, allowing the user to set the input or output signals on each single pin.

A hardware multiplier (8 bit by 8 bit with 16 bit result) and divider (16 bit over 8 bit with 8 bit result and 8 bit remainder) is available to implement complex functions by using a single instruction, optimizing program memory utilization and computational speed.

Fuzzy Logic dedicated structures in ST52x400/ 440/441 ICU’s can be exploited to model complex systems with high accuracy in a useful and easy way. Fuzzy Expert Systems for overall system management and fuzzy Real time Controls can be designed to increase performances at highly competitive costs.

The linguistic approach characterizing Fuzzy Logic is based on a set of IF-THEN rules, which describe the control behavior, as well as on Membership Functions, which are associated to input and output variables.

Up to 334 Membership Functions, with triangular and trapezoidal shapes, or singleton values are available to describe fuzzy variables.

The TIMER/PWM peripheral allows the management of power devices and timing signals, implementing different operating modes and high frequency PWM (Pulse With Modulation) controls. Input Capture and Output Compare functions are available on the TIMER.

The programmable Timer has a 16 bit Internal Prescaler and an 8 bit Counter. It can use internal or external START/STOP signals and clock.

An internal programmable WATCHDOG is avail- able to avoid loop errors and to reset the ICU.

An Analog Comparator with a 6 channel multi- plexer is available on ST52x440/441 family devices. This analog peripheral allows easy imple- mentation of a high resolution A/D conversion. By using only an external capacitor this peripheral may be configured in order to achieve up to 12 bit A/D converter resolution. It includes a 2.5 V band- gap reference for A/D conversion calibration, which can be used externally for signal condition- ing.

An on-chip TRIAC driver peripheral allows the direct management of power devices, implement- ing two different operating modes: Burst Mode (i.e. Thermal Applications), Phase Angle Partial- ization (i.e. Motors Control by Triacs). The TRIAC Driver also generates a PWM signal.

The ST52x400/440/441 family also includes an on-chip Power-on-Reset (POR), which provides an internal chip reset during power up situation and a Brown-Out Detector (BOD), which resets the ICU if the voltage source VDD dips below a minimum value.

In order to optimize energy consumption, two dif- ferent power saving modes are available: Wait mode and Halt mode.

Program Memory (EPROM/OTP) addressing capability addresses up to 8 Kbytes of memory locations to store both program instructions and permanent data.

EPROM can be locked by the user to prevent external undesired operations.

Operations may be performed on data stored in RAM, allowing the direct combination of new input and feedback data. All bytes of RAM are used like Register File.

OTP (One Time Programmable) version devices are fully compatible with the EPROM windowed version, which may be used for prototyping and pre-production phases of development.

A powerful development environment consisting of a board and software tools allows an easy con- figuration and use of ST52x400/440/441. The VISUAL FIVETM software tool allows development of projects through a user-friendly graphical interface and optimization of generated code

The VISUAL FIVETM software tool allows development of projects through a user-friendly graphical interface and optimization of generated code