W39V080FA

Publication Release Date: Dec. 13, 2005

- 17 -

Revision A5

6.19 Software Product Identification and Boot Block Lockout Detection Acquisition

Flow

Product

Identification

Entry (1)

Load data 55

to

address 2AAA

Load data 90

to

address 5555

Pause 10 S

Product

Identification

and Boot Block

Lockout Detection

Mode (3)

Read address = 00000

data = DA

Read address = 00001

data = D3

Read address = FFFF2

Check DQ[3:0] of data

outputs

(4)

Product

Identification Exit(6)

Load data 55

to

address 2AAA

Load data F0

to

address 5555

Normal Mode

(5)

(2)

(2)

Load data AA

to

address 5555

μ

Load data AA

to

address 5555

Pause 10 S

μ

Notes for software product identification/boot block lockout detection:

(1) Data Format: DQ7

−DQ0 (Hex); Address Format: A14−A0 (Hex)

(2) A1

(3) The device does not remain in identification and boot block lockout detection mode if power down.

(4) The DQ[3:2] to indicate the sectors protect status as below:

DQ2

DQ3

0

64Kbytes Boot Block Unlocked by

#TBL

hardware trapping

Whole Chip Unlocked by #WP hardware

trapping Except Boot Block

1

64Kbytes Boot Block Locked by #TBL

hardware trapping

Whole Chip Locked by #WP hardware trapping

Except Boot Block

(5) The device returns to standard operation mode.

(6) Optional 1-write cycle (write F0 (hex.) at XXXX address) can be used to exit the product identification/boot block lockout

detection.