Intel 4040

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Intel 4040
Central processing unit

An Intel D4040 Microprocessor
Produced: 1974
Manufacturer: Intel
Instruction Set: pre x86
Socket: 24 pin DIP

The Intel 4040 microprocessor was the successor to the Intel 4004. It was introduced in 1974.

The 4040 was used primarily in games, test, development, and control equipment. The package of the 4040 is more than twice as wide as the 4004 and has 24 pins vs. the 16 of the 4004. The 4040 added 14 instructions, larger stack (8 level), 8 KiB program space, 8 more registers, and interrupt abilities (including shadows of the first 8 registers).

The 4040 family is also referred to as the MCS-40.

Contents

[edit] New features

[edit] Extensions

  • Instruction Set expanded to 60 instructions
  • Program memory expanded to 8 KiB
  • Registers expanded to 24
  • Subroutine stack expanded to 7 levels deep

[edit] Designers

Federico Faggin proposed the project, formulated the architecture and led the design. The detailed design was done by Tom Innes.

[edit] New support chips

  • 4201 - Clock Generator 500 to 740 kHz using 4 to 5.185 MHz crystals
  • 4308 - 1 KiB ROM
  • 4207 - General Purpose byte Output port
  • 4209 - General Purpose byte Input port
  • 4211 - General Purpose byte I/O port
  • 4289 - Standard Memory Interface (replaces 4008/4009)
  • 4702 - 256 byte UVEPROM
  • 4316 - 2 KiB ROM
  • 4101 - 256 4-bit word RAM

[edit] MCS-40 Family Data Sheets

4001-2048-bit (256 x 8) ROM w/4-bit I/O Port

4201-4MHz Clock Generator

4207/4209/4211-General Purpose Byte Input Port

4265-Programmable General Purpose I/O Device

4269-Programmable Keyboard Display Device

4289-Standard Memory Interface for MCS-4/40

4308-8192-bit (1024 x 8) ROM w 4-bit IO Ports

4316-16384-bit (2048 x 8) Static ROM

4702-2048-bit (256 x 8) EPROM

4801-5.185 MHz Clock Generator Crystal for 4004_4201A or 4040/4201A CPU Set

[edit] External links


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