ST9291 Datasheet | STMicroelectronics

® 16-48K ROM HCMOS MCU WITH ON SCREEN DISPLAY AND VOLTAGE TUNING OUTPUT FUNCTIONAL DESCRIPTION Register oriented 8/16 bit CORE with RUN, WFI and HALT modes Minimum instruction cycle time: 500ns (12MHz internal) 16 to 48K bytes of ROM, 384/640 bytes of RAM, 224 general purpose registers available as RAM, accumulators or index registers (Register File) 42-lead Shrink DIP package or 56-lead Shrink DIP package Interrupt handler and Serial Peripheral Interface as standard Features 31 (42 pin package) / 42 (56 pin package) fully programmable I/O pins 34 character x15 rows software programmable On Screen Display module with colour, italic, underline, flash, transparent and fringe attribute options 14-bit Voltage Synthesis for tuning reference voltage. 8 8-bit PWM D/A outputs with repetition frequency 2 to 32k Hz and 12V Open Drain Capability 16 bit Timer with 8 bit Prescaler, able to be used as a Watchdog Timer 16-bit programmable Slice Timer with 8-bit prescaler 3 channel Analog to Digital Converter, with integral sample and hold, fast 5.75µs conversion time, 6-bit guaranteed resolution Rich Instruction Set and 14 Addressing modes Division-by-Zero trap generation Versatile Development tools, including assembler, linker, C-piler, archiver, graphic oriented debugger and hardware emulators Real Time Operating System Windowed EPROM parts available for prototyping and pre-production development phases PSDIP42 PSDIP56 (Ordering Information at the end of the Datasheet) DEVICE SUMMARY Device ST9291J2/N2 ST9291J3/N3 ST9291J4/N4 ST9291J5/N5 ST9291J6/N6 ST9291J7/N7 ROM 16K 16K 24K 24K 32K 48K RAM 384 640 384 640 640 640 PACKAGE PSDIP42/56 PSDIP42/56 PSDIP42/56 PSDIP42/56 PSDIP42/56 PSDIP42/56 July 1995 1/20 Figure 1. 42 Pin Shrink DIP Pinout 42 41 40 Figure 2. 56 Pin Shrink DIP Pinout 1 2 3 56 55 54 1 2 3 19 20 21 24 23 22 VR01740B 26 27 28 31 30 29 VR01740A ST9291J Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Pin name...