Z8F021ASH020SC datasheet(155/276 Pages) ZILOG

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PS022815-0206

Flash Memory

Z8 Encore! XP® 4K Series

Product Specification

136

Flash Memory

Overview

The products in the Z8 Encore! XP® 4K Series features either 4KB (4096), 2KB (2048

bytes), or 1KB (1024) of non-volatile Flash memory with read/write/erase capability. The

Flash Memory can be programmed and erased in-circuit by user code or through the On-

Chip Debugger.

The Flash memory array is arranged in pages with 512 bytes per page. The 512-byte page

is the minimum Flash block size that can be erased. Each page is divided into 8 rows of 64

bytes.

For program/data protection, the Flash memory is also divided into sectors. In the Z8

Encore! XP® 4K Series, these sectors are 512 bytes in size; each sector maps to a page.

Page and sector sizes are not equal for other members of the Z8 Encore!® family.

The first 2 bytes of the Flash Program memory are used as Flash Option Bits. Refer to the

chapter Flash Option Bits on page 148 for more information about their operation.

Table 79 describes the Flash memory configuration for each device in the Z8 Encore! XP®

4K Series. Figure 21 illustrates the Flash memory arrangement.

Table 79. Z8 Encore! XP® 4K Series Flash Memory Configurations

Part Number

Flash Size

KB (Bytes)

Flash

Pages

Program Memory

Addresses

Flash Sector

Size (bytes)

Z8F04xA

4 (4096)

0000H–0FFFH

512

Z8F02xA

2 (2048)

0000H–07FFH

512

Z8F01xA

1 (1024)

0000H–03FFH

512

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