This Data Sheet may be revised by subsequent versions

©2004 Eon Silicon Solution, Inc., www.essi.com.tw

or modifications due to changes in technical specifications.

4

EN25B05

Rev. B, Issue Date: 2006/12/26

MEMORY ORGANIZATION

The memory is organized as:

65,536 bytes

Flexible Sector Architecture

Two 4-Kbyte, one 8-Kbyte, one 16-Kbyte,one 32-Kbyte sectors

Bottom or top boot configurations

256 pages (256 bytes each)

Each page can be individually programmed (bits are programmed from 1 to 0). The device is Sector or

Bulk Erasable but not Page Erasable.

Table 2a. Bottom Boot Block Sector Architecture

Sector

SECTOR SIZE (KByte)

Address range

4

32

08000h – 0FFFFh

3

16

04000h – 07FFFh

2

8

02000h – 03FFFh

1

4

01000h – 01FFFh

0

4

00000h – 00FFFh

Table 2b. Top Boot Block Sector Architecture (Special order)

Sector

SECTOR SIZE (KByte)

Address range

4

4

0F000h – 0FFFFh

3

4

0E000h – 0EFFFh

2

8

0C000h – 0DFFFh

1

16

08000h – 0BFFFh

0

32

00000h – 07FFFh