w39l010 Winbond Electronics Corp America, w39l010 Datasheet - Page 16

• Manufacturer Part Number: w39l010
• Description: 128k X 8 Cmos Flash Memory
• Manufacturer: Winbond Electronics Corp America

7.9 Software Product Identification and Boot Block Lockout Detection Flow Chart
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ7  DQ0 (Hex); Address Format: A14  A0 (Hex)
(2) A1  A16 = V
(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.
Entry (1)
Identification
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
P
Identification
and Boot Block
Lockout
Detection Mode (3)
Product
Read address=02/1FFF2
data:in DQ1="1" or "0"
Read address = 0001
for Bottom/Top
Read address = 0000
for 8K Boot Block
data = 31
data = DA
IL
; device code is read for A0 = V
- 16 -
(4)
(2)
(2)
Identification Exit(6)
Product
IH
.
Normal Mode
address 5555
Load data
55
address 2AAA
Load data AA
address 5555
Load data F0
Pause 10 S
to
to
to
W39L010
P
(5)