ST8108

8K ROM HCMOS MICROCONTROLLER
SGS-Thomson Microelectronics, March 1990

The ST8108 is a complete HCMOS microcontroller unit (MCU). The device includes an on-chip oscillator, CPU, ROM, RAM, I/O, two serial interface systems (SCI, SPI) and one TIMER. The fully static design allows frequency operation down to DC, reducing power consumption when needed.

Hardware:

• HCMOS Technology.
• 8 Bit Core & Architecture.
• Power Saving Wait, Halt and RAM retention modes.
• 7744 Bytes of user ROM.
• 176 Bytes of RAM.
• 24 Bi-Directional I/O lines.
• 16 Bit free running counter timer featuring, one input capture system and one output compare system.
• Serial Peripherical Interface (Synchronous).
• Serial Communication Interface (Asynchronous).
• External, Timer, SCI and SPI interrupts.
• Master reset and Power on reset.
• Single 3 to 6 Volts supply.
• 2 Volts RAM retention mode.
• User Mask options:
  • RC or XTAL/Ceramic oscillator option.
  • Interrupt trigger: edge or level & edge.
  • Internal clock for TIMER, SCI and SPI.
• 40 pin DIP package.
• 44 Lead PLCC.

Software:

• 8 Bit data manipulation.
• 74 basic instructions.
• 8 by 8 unsigned multiply instructions.
• 7 main addresssing modes (Immediate, Direct, Extended, Relative, Indexed, Indirect and Bit).
• Development support on real time emulator, EPROM version and PC/DOS sofware (Cross Assembler, Debugger).

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