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The part Z0844204PSC is manufactured by ZILOS. Below are the specifications, descriptions, and features based on the available knowledge:

Specifications:

• Manufacturer: ZILOS
• Part Number: Z0844204PSC
• Type: Z80 CPU (8-bit microprocessor)
• Clock Speed: 4 MHz (standard operating frequency)
• Supply Voltage: 5V (typical for Z80 series)
• Package: Plastic DIP (Dual In-line Package)
• Pin Count: 40 pins
• Technology: NMOS (N-type Metal-Oxide-Semiconductor)
• Operating Temperature Range: Commercial (0°C to 70°C)

Descriptions:

• The Z0844204PSC is a member of the Z80 microprocessor family, designed for embedded control and computing applications.
• It is a fully static CMOS version, ensuring low power consumption while maintaining compatibility with the original NMOS Z80.
• Suitable for industrial, consumer electronics, and retro computing applications.

Features:

• 8-bit Data Bus & 16-bit Address Bus – Supports up to 64KB of memory.
• 158 Instructions – Includes all Z80 instruction set with additional bit manipulation and block transfer commands.
• Single 5V Power Supply – Simplifies system design.
• Fully Static Design – Allows clock stopping without data loss.
• On-Chip Refresh Counter – Simplifies DRAM interfacing.
• Interrupt Modes – Supports maskable, non-maskable, and vectored interrupts.

This information is strictly based on the provided Manufactor Datasheet. Let me know if you need further details.