Z8F021ASH020SC datasheet(23/276 Pages) ZILOG

23 / 276 page

PS022815-0206

Overview

Z8 Encore! XP® 4K Series

Product Specification

CPU and Peripheral Overview

eZ8 CPU Features

The eZ8 CPU, ZiLOG®’s latest 8-bit Central Processing Unit (CPU), meets the continuing

demand for faster and more code-efficient microcontrollers. The eZ8 CPU executes a

superset of the original Z8® instruction set. The eZ8 CPU features include:

• Direct register-to-register architecture allows each register to function as an

accumulator, improving execution time and decreasing the required program memory

• Software stack allows much greater depth in subroutine calls and interrupts than

hardware stacks

• Compatible with existing Z8® code

• Expanded internal Register File allows access of up to 4KB

• New instructions improve execution efficiency for code developed using higher-level

programming languages, including C

• Pipelined instruction fetch and execution

• New instructions for improved performance including BIT, BSWAP, BTJ, CPC, LDC,

LDCI, LEA, MULT, and SRL

• New instructions support 12-bit linear addressing of the Register File

• Up to 10 MIPS operation

• C-Compiler friendly

• 2 to 9 clock cycles per instruction

For more information regarding the eZ8 CPU, refer to the eZ8 CPU User Manual avail-

able for download at www.zilog.com.

General Purpose I/O

The Z8 Encore! XP® 4K Series features 6 to 25 port pins (Ports A–D) for general purpose

I/O (GPIO). The number of GPIO pins available is a function of package. Each pin is indi-

vidually programmable.

Flash Controller

The Flash Controller programs and erases Flash memory. The Flash Controller supports

several protection mechanisms against accidental program and erasure.

Z8F021ASH020SC 数据表(PDF) 23 Page - Zilog, Inc.