W39L512-90 WINBOND [Winbond], W39L512-90 Datasheet - Page 14

• Manufacturer Part Number: W39L512-90
• Description: 64K 8 COMS FLASH MEMORY
• Manufacturer: WINBOND [Winbond]

Software Product Identification and Boot Block Lockout Detection Flow Chart
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 output data in DQ0 or DQ1= " 1 " the boot block programming lockout feature is activated; if the output data
(5) The device returns to standard operation mode.
(6) Optional 1-byte cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout
detection.
in DQ0 or DQ1= " 0," the lockout feature is inactivated and the matched boot block can be programmed.
A15 = V
Identification
Entry (1)
Product
address 5555
address 5555
address 2AAA
Pause 10 S
Load data AA
Load data 55
Load data 90
IL
; manufacture code is read for A0 = V
to
to
to
DQ0 (Hex); Address Format: A15
Identification
and Boot Block
Lockout
Detection
Mode (3)
Product
Read address= 02/FFF2
for Bottom/Top
data: in DQ1 = "1" or "0"
for 8K Boot Block
Read address = 0000
Read address = 0001
data = DA
data = 38
IL
; device code is read for A0 = V
A0 (Hex)
- 14 -
(4)
(2)
(2)
Identification Exit(6)
Product
IH
.
Normal Mode
address 5555
Load data 55
Load data AA
address 2AAA
address 5555
Load data F0
Pause 10
to
to
to
W39L512
S
(5)