W39V040FBP WINBOND [Winbond], W39V040FBP Datasheet - Page 16

• Manufacturer Part Number: W39V040FBP
• Description: 512K X 8 CMOS FLASH MEMORY WITH FWH INTERFACE
• Manufacturer: WINBOND [Winbond]

9.5 Software Product Identification and Boot Block Lockout Detection Acquisition
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ7 DQ0 (Hex); Address Format: A14 A0 (Hex)
(2) A1 A18 = V
(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:
(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.
0
1
Flow
64Kbytes Boot Block Unlocked
by #TBL hardware trapping
64Kbytes Boot Block Locked by
#TBL hardware trapping
IL
; manufacture code is read for A0 = V
Identification
Product
Entry (1)
address 5555
address 5555
address 2AAA
Pause 10 S
Load data AA
Load data 55
Load data 90
DQ2
to
to
to
Mode (3)
Identification
and Boot Block
Lockout Detection
Product
Read address = 7FFF2
Check DQ[3:0] of data
outputs
Read address = 00001
Read address = 00000
Whole Chip Unlocked by #WP hardware
trapping Except Boot Block
Whole Chip Locked by #WP hardware
trapping Except Boot Block
data = DA
data = 54
IL
; device code is read for A0 = V
- 16 -
DQ3
(4)
(2)
(2)
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
W39V040FB
(5)