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Motorola MC6809P

In Stock: 2
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£10.00

Product Info

Motorola MC6809P 8bit Microprocessor


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8-Bit Microprocessing Unit

MC6800 Compatible

  • Hardware: Interfaces with all M6800 Peripherals
  • Software: Upwards Source Code Compatible Instruction Set and Addressing Modes

Architectural Features

  • Two 16-Bit Index Registers
  • Two 16-Bit Indexable Stack Pointers
  • Two 8-Bit Accumulators Can be Concatenated to form One 16-Bit Accumulator
  • Direct Page Register Allows Direct Addressing Throughout Memory

Hardware Features

  • On-Chip Oscillator (Crystal Frequency = 4 × E)
  • DMA BREQ Allows DMA Operation on Memory Refresh
  • Fast Interrupt Request Input Stacks Only Condition Code Register and Program Counter
  • MRDY Input Extends Data Access Times for Use with Slow Memory
  • Interrupt Acknowledge Output Allows Vectoring by Devices
  • Sync Acknowledge Output Allows for Synchronisation to External Event
  • Single Bus-Cycle RESET
  • Single 5 V Supply Operation
  • NMI Inhibited After RESET Until After First Load of Stack Pointer
  • Early Address Valid Allows Use with Slower Memories
  • Early Write Data for Dynamic Memories

Software Features

  • 10 Addressing Modes
    • 6800 Upward-Compatible Addressing Modes
    • Direct Addressing Anywhere in Memory Map
    • Long Relative Branches
    • Program Counter Relative
    • True Indirect Addressing
    • Expanded Indexed Addressing:
      • 0-, 5-, 8-, or 16-Bit Constant Offsets
      • 8- or 16-Bit Accumulator Offsets
      • Auto Increment / Decrement by 1 or 2
  • Improved Stack Manipulation
  • 1464 Instructions with Unique Addressing Modes
  • 8 × 8 Unsigned Multiply
  • 16-Bit Arithmetic
  • Transfer Exchange All Registers
  • Push Pull Any Registers or Any Set of Registers
  • Load Effective Address

(Data taken from Motorola Semiconductor MC6809 Datasheet)

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