Z8018233ASG

Overview

The Z8018233ASG is a static microprocessor unit (MPU) based on the Z8S180 core, operating at a maximum clock frequency of 33 MHz with a 5V supply. It features an 8-bit data bus and is housed in a 100-pin QFP package. The device integrates 64 kB of SRAM, two UART channels, two 16-bit timer counters, and three 8-bit parallel I/O ports. It includes a 16550 compatible MIMIC interface for direct connection to PC, XT, or AT buses, along with two ESCC channels supporting 32-bit CRC.

Feature Summary

• Integrates a fully static Z8S180 MPU core code-compatible with Zilog Z80/Z180 CPUs.
• Includes two ESCC channels with 32-bit CRC capability for enhanced serial communications.
• Features a 16550 compatible MIMIC interface enabling direct connectivity to IBM PC, XT, and AT buses.
• Provides on-chip wait state generators and individual control for RAMCS and ROMCS.

Applications

• Modem applications, particularly V.Fast implementations
• Fax machines and voice messaging systems
• General communications applications requiring high-speed serial processing

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to potential availability constraints. Confirm RoHS compliance status as indicated in official documentation. Ensure handling procedures account for moisture sensitivity requirements specified in the datasheet. Validate that the specific ordering suffix matches the required package and temperature range specifications before procurement.

Selection Notes

Select this component when a static Z80-compatible processor with integrated peripherals is required for communication interfaces. Consider the 33 MHz operating speed and 5V voltage level compatibility with existing system designs. Evaluate the need for the 16550 MIMIC interface if direct PC bus integration is necessary. Verify that the 100-pin QFP package fits the available PCB footprint and thermal management requirements.

Part Context

The Z80182 series belongs to Zilog's Intelligent Peripheral Controller (ZIP) family, designed to combine processing power with communication peripherals. This specific model utilizes the Z8S180 core, offering extended instructions and low EMI options compared to earlier variants. It serves as a bridge between standard serial protocols and host bus architectures.

Replacement Considerations

Z8018233FSG

FAQ

What is the function of the EV1 and EV2 pins?

EV1 and EV2 are Emulation Select inputs that determine the operational mode of the Z180 MPU, such as Normal mode, Emulation Adapter Mode, or Emulator Probe Mode.

How does the 16550 MIMIC interface operate?

The 16550 MIMIC interface allows the Z80182 to mimic a standard 16550 UART chip, enabling direct connection to PC, XT, and AT buses while maintaining software compatibility with current PC modem drivers.