The Zilog Z84C008PEC processor, a version of the Z80, has been in production and use since 1976. Despite the official production being discontinued, these chips are still manufactured in China and utilized in industrial automation, amateur computing, and custom control systems.
The processor's technical specifications are determined by its marking. The 'Z84C' prefix indicates a variable clock frequency ranging from 0 MHz up to the value specified by the suffix, such as 4 MHz or 8 MHz. The chip features a 40-pin PDIP package and supports an extended temperature range of -40 to +100 degrees Celsius.
The Z80 architecture includes a 16-bit address bus for 64 KB of memory and an 8-bit data bus. It utilizes a set of primary and alternative registers for arithmetic operations and interrupt handling, alongside specialized registers like the stack pointer and index registers.
The ecosystem includes several support chips such as the Z80PIO for parallel I/O, the Z80CTC timer, the Z80SIO for serial communication, the Z80DMA for direct memory access, and the Z80DART asynchronous transceiver. These components are available in various package types including DIP, PLCC, and PQFP.
