Z84C9010ASC

Specialized Overview

The Z84C9010ASC is a CMOS Serial/Parallel Counter/Timer KIO peripheral designed for the Z80 family. It integrates two synchronous/asynchronous serial channels, three 8-bit parallel ports, four independent counter/timer channels, and an on-chip clock oscillator into a single package. The device supports bus clock frequencies of 8, 10, and 12.5 MHz; this specific model operates at 10 MHz. It utilizes a 100-pin LQFP package and functions with a single +5 V power supply.

Specialized Feature Summary

• Integrates SIO, CTC, PIO, and PIA logic units within one component
• Supports software and hardware resets for individual internal peripherals
• Features programmable interrupt priorities via configurable daisy chain
• Includes on-chip crystal oscillator/driver to reduce external circuitry

Specialized Applications

• Multichannel I/O peripheral expansion for Z80-based systems
• Serial communication interface design requiring dual channels
• Hardware timing and event counting applications
• Embedded control systems utilizing parallel port interfacing

Specialized Procurement Notes

Verify the exact ordering suffix against the manufacturer's current documentation to confirm pinout compatibility and frequency rating. Confirm that the 100-pin LQFP package matches the target PCB footprint. Check for any end-of-life notifications or product change notices associated with this specific revision level before finalizing procurement plans.

Specialized Selection Notes

Select this component when a system requires multiple distinct I/O types without consuming separate IC slots. Ensure the host CPU supports the required address decoding scheme for the fifteen internal registers. Verify that the 10 MHz operating speed meets the system bus requirements and that the thermal characteristics of the LQFP package are suitable for the intended environment.

Specialized Part Context

This part belongs to the Z84C90 KIO series, which combines standard Zilog peripheral functions into a single chip. Variants in this series differ primarily by maximum operating frequency and physical package type. The 'ASC' suffix denotes the 10 MHz speed grade housed in the 100-pin LQFP form factor.

Specialized Replacement Considerations

Direct replacements include other Z84C90 variants such as the Z84C9008ASC (8 MHz) or Z84C9010VSC (PLCC package). Substituting these requires verifying frequency tolerance and physical package compatibility respectively.