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GENERAL DESCRIPTION

INTRODUCTION

The ST9216x family brings the enhanced ST9 register-based architecture to a new range of high performance microcontrollers specifically designed for USB (Universal Serial Bus) applications. Their performance derives from the use of a

flexible 256-register programming model for ultrafast context switching and real-time event response. The intelligent on-chip 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.

¡ö Internal Memories: 20 Kbytes ROM/EPROM/OTP, 2 Kbytes RAM

¡ö Register oriented 8/16 bit core

¡ö 224 general purpose registers available as RAM, accumulators or index pointers

¡ö Minimum instruction cycle time: 167 ns (@24 MHz CPU frequency)

¡ö Low power modes: WFI, SLOW, HALT and STOP

¡ö DMA controller for reduced processor overhead

¡ö Full speed USB interface with DMA, compliant with USB specifications version 1.1 (in normal voltage mode)

¡ö USB Embedded Functions with 16 fully configurable endpoints (buffer size programmable), supporting all USB data transfer types (Isochronous included)

¡ö On-chip USB transceiver and 3.3 voltage regulator

¡ö Multimaster I2C-bus serial interface up to 400KHz. with DMA capability

¡ö Serial Communications Interface (SCI) with DMA capability:

¨C Asynchronous mode up to 315 Kb/s

¨C Synchronous mode up to 3 MHz

¡ö External memory interface (8-bit data/16-bit address) with DMA capability from the USB

¡ö 16-bit Multi-Function Timer (12 operating modes) with DMA capability

¡ö 16-bit Timer with 8-bit prescaler and Watchdog

¡ö 6-channel, 8-bit A/D Converter (ADC)

¡ö 15 interrupt pins on 8 interrupt channels

¡ö 14 pins programmable as wake-up or additional external interrupts

¡ö 42 (DIP56) or 44 (QFP64) fully programmable I/Os with 6 or 8 high sink pads (10 mA @ 1 V)

¡ö Programmable PLL clock generator (RCCU) using a low frequency external quartz (8 MHz)

¡ö On-chip RC oscillator for low power operation

¡ö Low Voltage Detector Reset on some devices1

¡ö Rich instruction set with 14 addressing modes

¡ö Several operating voltage modes available on some devices1 :

¨C Normal Voltage Mode

¨C 8-MHz Low Voltage Mode

¨C 16-MHz Low Voltage Mode

¡ö 0 - 24 MHz CPU clock operation @ 4.0-5.5 V (all devices)

¡ö 0 - 8 MHz CPU clock operation @ 3.0-4.0 V (8-MHz and 16-MHz Low Voltage devices)

¡ö 0 - 16 MHz CPU clock operation @ 3.0-4.0 V (16-MHz Low Voltage devices only)

¡ö Division-by-zero trap generation

¡ö 0oC to 70oC temperature range

¡ö Low EMI design supporting single sided PCB

¡ö Complete development tools, including assembler, linker, C-compiler, archiver, source level debugger and hardware emulators, and Real Time Operating System