ST9+ FAMILY

The ST9+ FAMILY 8/16 bit microcontroller family introduces a new generation of single-chip architecture. It offers fast program execution, efficient use of memory, sophisticated interrupt handling, input/output (I/O) flexibility and bit-manipulation capabilities, with easy system expansion. Virtually all of the ST9 configuration can be tailored to the needs of the user under program control. This enables the ST9 to serve as an I/O intensive microcontroller, as an intelligent peripheral controller within a larger system, or as a memory intensive microprocessor.

Programming of the ST9+ FAMILY is made easy in both high level languages such as C, or directly in assembler language, by the versatility of the 14 addressing modes coupled with the comprehensive instruction set operating on bits, BCD, 8 bit bytes and 16 bit words. The availability of the Register File, giving the programmer multiple 8 and 16 bit accumulators and index pointers, the fast interrupt response time, on-chip DMA and on-chip and external memory access capabilities give the ST9 a high efficiency for real-time control applications.

The ST9+ FAMILY has a range of family devices made up from various memory combinations (RAM, ROM/ EPROM, EEPROM), powerful peripherals such as Multifunction Timers, Analog to Digital Converters, Serial Communications Interfaces and a standard Core.

The remainder of this section describes in more detail the ST9 features of primary interest to assembly language programmers. Please refer to the ST9+ FAMILY Technical Manual for detailed architectural and configuration information.