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CDP1805 - CMOS 8-Bit Microprocessor with On-Chip RAM and Counter/Timer

General Description

The CDP1805AC and CDP1806AC are functional and performance enhancements of the CDP1802 CMOS 8-bit register-oriented microprocessor series and are designed for use in general-purpose applications.

The CDP1805AC hardware enhancements include a 64byte RAM and an 8-bit presettable down counter.

Key Features

  • Instruction Time of 3.2µs, -40oC to +85oC.
  • 123 Instructions - Upwards Software Compatible With CDP1802.
  • BCD Arithmetic Instructions.
  • Low-Power IDLE Mode.
  • Pin Compatible With CDP1802 Except for Terminal 16.
  • 64K-Byte Memory Address Capability.
  • 64 Bytes of On-Chip RAM†.
  • 16 x 16 Matrix of On-Board Registers.
  • On-Chip Crystal or RC Controlled Oscillator.
  • 8-Bit Counter/Timer n Ordering Information CDP1805AC CDP.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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TM CDP1805AC, CDP1806AC CMOS 8-Bit Microprocessor with On-Chip RAM† and Counter/Timer Description The CDP1805AC and CDP1806AC are functional and performance enhancements of the CDP1802 CMOS 8-bit register-oriented microprocessor series and are designed for use in general-purpose applications. The CDP1805AC hardware enhancements include a 64byte RAM and an 8-bit presettable down counter. The Counter/Timer which generates an internal interrupt request, can be programmed for use in timebase, event-counting, and pulse-duration measurement applications. The Counter/Timer underflow output can also be directed to the Q output terminal. The CDP1806AC hardware enhancements are identical to the CDP1805AC, except the CDP1806AC contains no on-chip RAM.