Z86C89PLCC Datasheet | Zilog.

CUSTOMER PROCUREMENT SPECIFICATION Z86C90/C89 ROMLESS CMOS Z8® 8-BIT MICROCONTROLLER GENERAL DESCRIPTION The Z86C90/C89 CCP™ (Consumer Controller Processor) introduces a new level of sophistication to single-chip architecture. The Z86C90/C89 are ROMless members of the Z8 single-chip microcontroller family with 236 bytes of general purpose RAM. The only difference that exists between the Z86C89 and the Z86C90 is that the on-chip oscillator of the Z86C89 can accept an external RC network or other external clock source, while the Z86C90's on-chip oscillator accepts a crystal, ceramic resonator, LC, or external clock source drive. The CCP controllers are housed in a 40-pin DIP, 44-pin Leaded Chip Carrier, or a 44-pin Quad Flat Pack, and are CMOS patible. The CCP offers the use of external memory which enables this Z8 microputer to be used where code flexibility is required. Zilog's CMOS microputer offers fast execution, efficient use of memory, sophisticated interrupts, input/output bit manipulation capabilities, and easy hardware/software system expansion along with low cost and low power consumption. The Z86C90/C89 architecture is based on Zilog's 8-bit microcontroller core with an Expanded Register File to allow access to register mapped peripheral and I/O circuits. The CCP offers a flexible I/O scheme, an efficient register and address space structure, and a number of ancillary Features that are useful in many industrial, automotive, puter peripherals, and advanced scientific applications. The CCP applications demand powerful I/O capabilities. The Z86C90/C89 fulfills this with 32 pins dedicated to input and output. These lines are grouped into four ports. Each port consists of eight lines, and is configurable under software control to provide timing, status signals, parallel I/O with or without handshake, and an address/data bus for interfacing external memory. There are four basic address spaces available to support this wide range of configurations:...