Zilog Z180

The Zilog Z180 eight-bit processor is a successor of the Z80 CPU. It is compatible with the large base of software written for the Z80.[1] The Z180 family adds higher performance and integrated peripheral functions like clock generator, 16-bit counters/timers, interrupt controller, wait-state generators, serial ports and a DMA controller.[2] It uses separate read and write strobes, sharing similar timings with the Z80 and Intel processors.[3] The on-chip memory management unit (MMU) has the capability of addressing up to 1 MB of memory. It is possible to configure the Z180 to operate as the Hitachi HD64180.[4]

Older Z180 in 68-pin PLCC package (the smaller 80-pin QFP and LQFP packages are more common today.)
Z8S180 in 64-pin DIP

Variants
Chip Speed (MHz) Timers I/O Comm. Contr. Others
Z80180 6, 8, 102 N/SCPU1 MB MMU, 2xDMAs, 2xUARTs
Z80181 101 16CPU1 MB MMU, 2xDMAs, 2xUARTs
Z80182 16, 20, 332 Clock, Serial, 24ESCC, CSIO, UART, PIOS180 Megacell, 2xESCC channels, 3*8bit IO, 16550 MIMIC
Z80185/Z80195 20, 334 7/24SCC, CSIO, UART
Z8L180 202 Clock SerialCSIO, UART1 MB MMU, 2xDMAs, 2xUARTs, 3.3 V Operation
Z8L182 202 Clock, Serial, 24ESCC, CSIO, UART, PIOS180 Megacell, 2xESCC channels, 3*8bit IO, 16550 MIMIC, 3.3V operation
Z8S180 10, 20, 332 Clock SerialUART, DMA1 MB MMU, 2xDMAs, 2xUARTs
Z8S183 10, 20, 332 Clock SerialUART, DMA1 MB MMU, 2xDMAs, 2xUARTs 16550, MIMIC, 3.3V operation[5]
Z8S189 10, 20, 332 Clock SerialUART, DMA1 MB MMU, 2xDMAs, 2xUARTs, 3.3V operation[6]

Z80182

The Zilog Z80182, introduced in 1997, is an enhanced, faster version of the older Z80 and is part of the Z180 microprocessor family. It is nicknamed the Zilog Intelligent Peripheral Controller (ZIP). It is also fully static (the clock can be halted and no data in the registers will be lost) and has a low EMI option that reduces the slew rate of the outputs.

The Z80182 can operate at 33 MHz with an external oscillator for 5-volt operation, or at 20 MHz using the internal oscillator for 3.3-volt operation.[7]

References
  1. Ganssle, Jack (1992). "The Z80 Lives!". The designers picked an architecture compatible with the Z80, giving Z80 users a completely software compatible upgrade path
  2. Jack G. Ganssle. (1992). The art of programming embedded systems. San Diego: Academic Press. p. 13. ISBN 978-0-12-274880-6.
  3. Stuart R. Ball. (2002). Embedded microprocessor systems real world design. Amsterdam: Newnes. p. 34. ISBN 978-0-7506-7534-5.
  4. "Z80 Application Note: Migrating from the Hitachi HD64180 to ZiLOG's Z80180, page 7 Summary". zilog.com/appnotes_download.php. Zilog Inc. Retrieved May 20, 2019.
  5. "Mixed-Signal Z183 Webserver" (PDF). Retrieved 2023-08-22.
  6. "Www.Alldatasheet.Com" (PDF).
  7. "CPU Control Register". Z80182/Z8L182 Zilog Intelligent Peripheral Controller Product Specification. San Jose, California: Zilog. 1997. pp. 3–48.

Further reading
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