Name/Title
1974- P4040 2nd 4-bit Microprocessor, IntelTags
IntelDescription
The Intel 4040 (pronounced “fourty-fourty”) is the second 4-bit microprocessor designed and manufactured by Intel. Introduced in 1974 as a successor to the Intel 4004, the 4040 was produced using a 10 µm process and featured silicon gate enhancement-load PMOS logic technology. Here are some key details about the Intel 4040:General Notes
Note
Specifications:
Clock Rate: Ranged from 500 kHz to 740 kHz.
Data Width: 4 bits.
Address Width: 12 bits (multiplexed).
Instruction Set: 60 instructions (expanded from the original 46 of the 4004).
Transistors: Approximately 3,000.
Performance: Could execute around 62,000 instructions per second.
Package: Used a larger 24-pin dual inline package compared to the 16-pin 4004.
Notable Improvements:
Interrupts: The 4040 included interrupt support, addressing a major oversight in the 4004.
Halt/Stop System: Allowed low-power mode and single-step debugging.
Expanded ROM Addressing: Doubled the amount of ROM addressable compared to the 4004.
Legacy:
Although replaced by semiconductor memory, the Intel 4040 remains an iconic part of computing history.