The R65C02P4 is an 8-bit microprocessor manufactured by Rockwell. It is a CMOS version of the popular 6502 processor, known for its use in classic computers like the Apple II, Commodore 64, and Atari consoles. The R65C02P4 offers improved performance and lower power consumption compared to its NMOS predecessors.

Applications

• Embedded Systems
• Industrial Controllers
• Consumer Electronics
• Educational Computers
• Retro Computing Projects

Features

• 8-bit data bus
• 16-bit address bus, allowing access to 64KB of memory
• CMOS technology for low power consumption
• Decimal mode for accurate BCD arithmetic
• Multiple addressing modes for flexible memory access
• External interrupt handling
• Non-maskable interrupt (NMI)

Benefits

• Low power consumption suitable for battery-powered applications
• Simple and well-documented architecture
• Large existing base of software and development tools
• Reliable and robust performance
• Cost-effective solution for embedded control
• Familiar architecture for developers experienced with the 6502 family

Detailed Specs

The R65C02P4 operates with a clock frequency that varies depending on the specific version, but is typically in the range of 1-4 MHz. It features a rich instruction set, including arithmetic, logical, and memory access instructions. The decimal mode allows for accurate BCD arithmetic, which is useful for applications such as point-of-sale systems and instrumentation. The processor has a stack pointer for subroutine calls and interrupt handling, and supports both maskable and non-maskable interrupts. The CMOS technology significantly reduces power consumption compared to the original NMOS 6502, making it suitable for a wider range of applications. The R65C02P4 remains a popular choice for hobbyists, retro computing enthusiasts, and embedded system designers who value its simplicity, low power consumption, and extensive software library. Its straightforward design makes it easier to understand and program than many modern microprocessors.