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INTRODUCTION

The ST92141 microcontroller is developed and manufactured by STMicroelectronics using a proprietary n-well HCMOS process. Its performance derives from the use of a flexible 256-register programming model for ultra-fast context switching and real-time event response. The intelligent onchip peripherals offload the ST9 core from I/O and data management processing tasks allowing critical application tasks to get the maximum use of core resources. The new-generation ST9 MCU devices now also support low power consumption and low voltage operation for power-efficient and low-cost embedded systems.

■ Register File based 8/16 bit Core Architecture with RUN, WFI, SLOW, HALT and STOP modes

■ 0-25 MHz Operation (internal clock) @ 5V±10 voltage range

■ -40°C to +85°C Operating Temperature Range

■ Fully Programmable PLL Clock Generator, with Frequency Multiplication and low frequency, low cost external crystal (3-5 MHz)

■ Minimum Instruction Cycle time: 160 ns - (@ 25 MHz internal clock frequency)

■ Internal Memory:

– EPROM/OTP/FASTROM 16K bytes

– RAM 512 bytes

■ 224 general purpose registers available as RAM, accumulators or index pointers (register file)

■ 32-pin Dual Inline and 34-pin Small Outline Packages

■ 15 programmable I/O pins with Schmitt Trigger input, including 4 high sink outputs (20mA @ VOL=3V)

■ 4 Wake-up Interrupts (one usable as NonMaskable Interrupt) for emergency event management

■ 3-phase Induction Motor Controller (IMC) Peripheral with 3 pairs of PWM outputs and asynchronous emergency stop

■ Serial Peripheral Interface (SPI) with Master/ Slave Mode capability

■ 16-bit Timer with 8-bit Prescaler usable as a Watchdog Timer

■ 16-bit Standard Timer with 8-bit Prescaler

■ 16-bit Extended Function Timer with Prescaler, 2 Input Captures and 2 Output Compares

■ 8-bit Analog to Digital Converter allowing up to 6 input channels with autoscan and watchdog capability

■ Low Voltage Detector Reset

■ Rich Instruction Set with 14 Addressing Modes

■ Division-by-Zero trap generation

■ Versatile Development Tools, including Assembler, Linker, C-compiler, Archiver, Source Level Debugger and Hardware Emulators with Real-Time Operating System available from Third Parties