ST9294

The ST9294 is a ROM member of the ST9 family of microcontrollers, completely developed and produced by SGS-THOMSON Microelectronics using a proprietary n-well HCMOS process.

The ROM parts are fully compatible with their EPROM versions, which may be used for the prototyping and pre-production phases of development.

The nucleus of the ST9294 is the advanced Core which includes the Central Processing Unit (CPU), the Register File, a 16-bit Timer/Watchdog with 8- bit Prescaler, a Serial Peripheral Interface supporting S-bus, I2C-bus and IM-bus Interface, plus two 8-bit I/O ports. The Core has independent memory and register buses allowing a high degree of pipelining to add to the efficiency of the code execution speed of the extensive instruction set.

The powerful I/O capabilities demanded by microcontroller applications are fulfilled by the ST9294 with up to 31/42 I/O lines dedicated to digital Input/ Output. These lines are grouped into up to six I/O Ports and can be configured on a bit basis under software control to provide timing, status signals, timer inputs and outputs, analog inputs, external interrupts and serial or parallel I/O.

Three basic memory spaces of the ST9294 are available to support this wide range of configurations: Program Memory, Data Memory and the Register File, which includes the control and status registers of the on-chip peripherals.

The 16-bit Slice Timer with an 8-bit Prescaler. The human interface of the ST9294 is provided by the On Screen Display module, this can produce up to 15 lines of up to 34 characters from a ROM defined 128 character set. The 9x13 character can be modified by 4 different pixel sizes, with character rounding, and formed into words with colour and format attributes. Closed Caption control for the display of information transmitted through the video input is facilitated with the Data Slicer. This module has manual and automatic Slicing levels for both Sync and Data and allows the user to select the video line containing the data relative to the Vertical synchronisation pulse.