28F320J5 datasheet(21/53 Pages) INTEL

21 / 53 page

INTEL StrataFlash™ MEMORY TECHNOLOGY, 32 AND 64 MBIT

ADVANCE INFORMATION

4.2.3

BLOCK STATUS REGISTER

The Block Status Register indicates whether a given block is locked and can be accessed for program/erase

operations. On SCS devices that do not implement block locking, BSR.0 will indicate functional block status

on partially functional devices. The Block Status Register is accessed from word address 02h within each

block.

Table 8. Block Status Register

Offset

Length

(bytes)

Description

Intel StrataFlash™

Memory

x16 device/mode

(BA +2)h1

01h

Block Status Register

BA+2: 0000h or

0001h

BSR.0 =

Block Lock or Non-Functional Status

(Optional)

1 = Locked or Non-Functional

0 = Unlocked

BA+2 (bit 0): 0 or 1

BSR.1 =

Block Erase or Non-Functional

Status(2) (Optional)

1 = Last erase operation did

not complete successfully or Non-

Functional

0 = Last erase operation

completed successfully or Functional

BA+2 (bit 1): 0

(The device does

not support Block

Erase Status)

BSR 2–7

Reserved for future use

BA+2 (bits 2–7): 0

NOTES:

1. BA = The beginning location of a Block Address (i.e., 2000h is the beginning location of block 2).

2. Block Erase Status is an optional part of the SCS definition and is not incorporated on this device.

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