w49v002fa Winbond Electronics Corp America, w49v002fa Datasheet - Page 11

• Manufacturer Part Number: w49v002fa
• Description: 256k X 8 Cmos Flash Memory With Fwh Interface
• Manufacturer: Winbond Electronics Corp America

Software Product Identification and Boot Block Lockout Detection Acquisition
Flow
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ7
(2) A1
(3) The device does not remain in identification and boot block lockout detection mode if power down.
(4) If the DQ0 of output data is "1," the boot block programming lockout feature is activated; if the DQ0 of output data "0," the
(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
lockout feature is inactivated and the block can be programmed.
detection.
A17 = V
Identification
Product
Entry (1)
address 5555
IL
address 5555
address 2AAA
Pause 10 S
Load data AA
Load data 55
Load data 90
; manufacture code is read for A0 = V
to
to
to
DQ0 (Hex); Address Format: A14
Identification
and Boot Block
Lockout Detection
Mode (3)
Product
DQ0 of data outputs = 1/0
Read address = 00002
Read address = 00001
Read address = 00000
data = DA
data = 32 (Hex)
IL
; device code is read for A0 = V
A0 (Hex)
- 11 -
(4)
(2)
(2)
Publication Release Date: February 19, 2002
Identification Exit(6)
Product
Normal Mode
address 5555
IH
Load data 55
address 2AAA
Load data AA
address 5555
Load data F0
Pause 10 S
.
to
to
to
W49V002FA
(5)
Revision A2