Zilog Z8

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Zilog Z8

The Zilog
Zilog

Zilog, Inc., often seen as ZiLOG , is a manufacturer of 8-bit, 16-bit, 24-bit, and 32-bit microprocessors, and is most famous for its Intel 8080-compatible Zilog Z80 series....
Z8 is a microcontroller

Microcontroller

A microcontroller is a small computer on a single integrated circuit consisting of a relatively simple CPU combined with support functions such as a crystal oscillator, timers, watchdog, serial and analog I/O etc....
architecture, originally introduced in 1979, which today also includes the eZ8 Encore!, eZ8 Encore! XP, and eZ8 Encore! MC families.

Signifying features of the architecture are up to 4096 fast on-chip registers which may be used as accumulators, pointers, or as ordinary RAM

Ram

Ram, ram, or RAM as a non-acronymic wordAs a non-acronymic word Ram, ram, or RAM may refer to:...
. A 16-bit address space for between 1K and 64K of either OTP

OTP

OTP may mean:* Outdoor Therapeutic Program: see articles on wilderness therapy and adventure therapy* One-time programmable, a type of programmable read-only memory in electronics...
ROM

Read-only memory

Read-only memory is a class of computer storage media used in computers and other electronic devices. Because data stored in ROM cannot be modified , it is mainly used to distribute firmware ....
or Flash memory

Flash memory

Flash memory is a non-volatile memory computer storage that can be electrically erased and reprogrammed. It is a technology that is primarily used in memory cards and USB flash drives for general storage and transfer of data between computers and other digital products....
are used to store code and constants, and there is also a second 16-bit address space which may be used for large applications.

On chip peripheral

Peripheral

A peripheral is a device attached to a host computer behind the chipset whose primary functionality is dependent upon the host, and can therefore be considered as expanding the hosts capabilities, while not forming part of the system's core computer architecture....
s include A/D converters, SPI

Serial Peripheral Interface Bus

The Serial Peripheral Interface Bus or SPI bus is a synchronous Serial communications standard named by Motorola that operates in full duplex mode....
and I²C

I²C

I?C isa multi-master bus serial communications computer bus invented by Philips that is used to attach low-speed peripherals to a motherboard, embedded system, or cellphone....
channels, IrDA

IRDA

IRDA may refer to:* Infrared Data Association, in information and communications technology , a standard for communication between devices over short distances using infrared signals...
encoders/decoders etc.

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Encyclopedia

Microcontroller

Ram

Ram, ram, or RAM as a non-acronymic wordAs a non-acronymic word Ram, ram, or RAM may refer to:...
. A 16-bit address space for between 1K and 64K of either OTP

OTP

OTP may mean:* Outdoor Therapeutic Program: see articles on wilderness therapy and adventure therapy* One-time programmable, a type of programmable read-only memory in electronics...
ROM

Read-only memory

Flash memory

Peripheral

Serial Peripheral Interface Bus

The Serial Peripheral Interface Bus or SPI bus is a synchronous Serial communications standard named by Motorola that operates in full duplex mode....
and I²C

I²C

I?C isa multi-master bus serial communications computer bus invented by Philips that is used to attach low-speed peripherals to a motherboard, embedded system, or cellphone....
channels, IrDA

IRDA

MicroLeadFrame

A MicroLeadFrame is a type of chip scale package chip carrier. Amkor Technology introduced the MicroLeadFrame package in late 1999. This type of package provides contacts around the periphery of all four edges....
, SSOP

Shrink Small-Outline Package

Shrink small-outline package is a integrated circuit package for surface-mount technology. SSOP chips have "gull wing" leads protruding from the two long sides, and a lead spacing of 0.025 inches ....
, SOIC

Small-Outline Integrated Circuit

A small-outline integrated circuit is a Surface-mount technology integrated circuit package which occupies an area about 30 - 50% less than an equivalent dual in-line package, with a typical thickness that is 70% less....
and LQFP

LQFP

A Low-profile Quad Flat Package is a surface mount integrated circuit package format with component leads extending from each of the four sides....
packages. The eZ8 Encore! series can be programmed and debugged through a single pin serial interface.

The basic architecture, a modified (non strict) Harvard architecture

Harvard architecture

The Harvard architecture is a computer architecture with physically separate computer storage and signal pathways for instructions and data. The term originated from the Harvard Mark I relay-based computer, which stored instructions on punched tape and data in electro-mechanical counters ....
, is technically very different from the Zilog Z80

Zilog Z80

The Zilog Z80 is an 8-bit microprocessor designed and sold by Zilog from July 1976 onwards. It was widely used both in desktop and embedded computer designs as well as for military purposes....
. Despite this, the instruction set

Instruction set

An instruction set is a list of all the instruction , and all their variations, that a processor can execute.Instructions include:* Arithmetic such as add and subtract...
and assembly syntax

Syntax

In linguistics, syntax is the study of the principles and rules for constructing Sentence s in natural languages. In addition to referring to the discipline, the term syntax is also used to refer directly to the rules and principles that govern the sentence structure of any individual language, as in "the Irish syntax"....
are quite similar to other Zilog processors: Load/store operations uses the same LD mnemonic (no MOV or MOVEs), typifying instructions such as DJNZ, are the same, and so on.

A free C compiler and IDE can be downloaded from Zilog's website.

Primary competitors include the somewhat similar Microchip

Microchip Technology

Microchip Technology is an USA manufacturer of microcontroller, memory and analog semiconductors. The company was founded in 1987 when General Instrument spun off its microelectronics division as a wholly owned subsidiary....
PIC

PIC microcontroller

PIC is a family of Harvard architecture microcontrollers made by Microchip Technology, derived from the PIC1640 originally developed by General Instrument's Microelectronics Division....
family, and all the Intel 8051

Intel 8051

The Intel 8051 is a Harvard architecture, single chip microcontroller which was developed by Intel in 1980 for use in embedded systems. Intel's original versions were popular in the 1980s and early 1990s, but has largely been superseded by a vast range of faster and/or functionally enhanced 8051-compatible devices manufactured by more th...
descendants. Also more traditional "von Neumann based" single chip microcontroller

Microcontroller

Motorola 6800

The 6800 is an 8-bit microprocessor produced by Motorola and released shortly after the Intel 8080 in late 1974. It had 78 instructions, including the famous, undocumented Halt and Catch Fire bus test instruction....
/6809

Motorola 6809

The Motorola 6809 is an 8-bit microprocessor central processing unit from Motorola, introduced circa 1977-78. It was a major advance over both its predecessor, the Motorola 6800, and the related, MOS Technology 6502....
based Motorola 68HC11, the Hitachi H8 family, and Z80-derivatives, such as Toshiba

Toshiba

is a multinational corporation list of conglomerates manufacturing company, headquartered in Tokyo, Japan. The company's main business is in Infrastructure, Consumer Products, and Electronic devices and components....
TLCS-870, to name just a few.

Product line

ROMless: Models without integrated ROM.
ROM: Models with integrated ROM.
OTP: Models with integrated OTP ROM
Programmable read-only memory

A programmable read-only memory or field programmable read-only memory is a form of digital memory where the setting of each bit is locked by a Fuse or antifuse....
.
Low Voltage: Working voltage run as low as 2V.
GP: General purpose microcontroller.
Encore!: Integrated flash-based memory.
Encore! XP: Encore! with sensors.
Encore! MC (Motor Control): Motor control applications.

Zilog Z8

Product line

External links