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The Zilog Z8 is a microcontroller architecture, originally introduced in 1979, which today also includes the eZ8 Encore!,〔''The "Encore!" products contains the newer eZ8 core which is 2-3 times as clock cycle efficient as the original Z8 core.''〕 eZ8 Encore! XP, and eZ8 Encore! MC families. Signifying features of the architecture are up to 4,096 fast on-chip registers which may be used as accumulators, pointers, or as ordinary RAM. A 16-bit address space for between 1 KB and 64 KB of either OTP ROM or flash memory 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 peripherals include A/D converters, SPI and I²C channels, IrDA encoders/decoders etc. There are versions with from 8 up to 80 pins, housed in PDIP, MLF, SSOP, SOIC and LQFP 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, is ''technically'' very different from the Zilog Z80. Despite this, the instruction set and assembly 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〔''The PIC and the 8051 are using Harvard architectures as well, but in a more rigid manner.''〕 Microchip PIC family, and all the Intel 8051 descendants. Also more traditional "von Neumann based" single chip microcontrollers may be regarded as competitors, such as the 6800/6809 based Motorola 68HC11, the Hitachi H8 family, and Z80-derivatives, such as Toshiba TLCS-870, to name just a few. ==Product line== *ROMless: Models without integrated ROM. *ROM: Models with integrated ROM. *BASIC: Models with integrated BASIC interpreter and debugger in ROM. *OTP: Models with integrated OTP ROM. *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. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Zilog Z8」の詳細全文を読む スポンサード リンク
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