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INTRODUCTION

The ST92185B 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 ST92185B MCU supports 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 and HALT modes

■ 0°C to +70°C operating temperature range

■ Up to 24 MHz. operation @ 5V±10

■ Min. instruction cycle time: 165ns at 24 MHz.

■ 16, 24 or 32 Kbytes ROM

■ 256 bytes RAM of Register file (accumulators or index registers)

■ 256 bytes of on-chip static RAM

■ 2 Kbytes of TDSRAM (Display Storage RAM)

■ 28 fully programmable I/O pins

■ Serial Peripheral Interface

■ Flexible Clock controller for OSD, Data Slicer and Core clocks running from a single low frequency external crystal.

■ Enhanced display controller with:

– 26 rows of 40 characters or 24 rows of 80 characters

– Serial and Parallel attributes

– 10x10 dot matrix, 512 ROM characters, definable by user

– 4/3 and 16/9 supported in 50/60Hz and 100/ 120 Hz mode

– Rounding, fringe, double width, double height, scrolling, cursor, full background color, halfintensity color, translucency and half-tone modes

■ Integrated Sync Extractor and Sync Controller

■ 14-bit Voltage Synthesis for tuning reference voltage

■ Up to 6 external interrupts plus one NonMaskable Interrupt

■ 8 x 8-bit programmable PWM outputs with 5V open-drain or push-pull capability

■ 16-bit watchdog timer with 8-bit prescaler

■ One 16-bit standard timer with 8-bit prescaler

■ 4-channel A/D converter; 5-bit guaranteed

■ Rich instruction set and 14 addressing modes

■ Versatile development tools, including Assembler, Linker, C-compiler, Archiver, Source Level Debugger and hardware emulators with Real-Time Operating System available from third parties

■ Pin-compatible EPROM and OTP devices available (ST92E195D7D1, ST92T195D7B1)

■ Pin-compatible with the ST92195 family with embedded teletext decoder