W39F010 Datasheet, PDF (18/33 Pages) Winbond – 128K × 8 CMOS FLASH MEMORY

W39F010
7.7 Software Product Identification and Boot Block Lockout Detection Flow Chart
Product
Identification
Entry (1)
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data 90
to
address 5555
Pause 10 μS
Product
Identification
and Boot Block
Lockout Detection
Mode (3)
Product
Identification Exit(6)
Load data AA
to
address 5555
(2)
Read address = 0000
data = DA
Load data 55
to
address 2AAA
(2)
Read address = 0001
data = A1
Load data F0
to
address 5555
(4)
Read address=02/1FFF2
for Bottom/Top
data: in DQ1="1" or "0"
for 16K Boot Block
Pause 10 μS
(5)
Normal Mode
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ7−DQ0 (Hex); Address Format: A14−A0 (Hex)
(2) A1−A16 = VIL; manufacture code is read for A0 = VIL; device code is read for A0 = VIH.
(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
in DQ0 or DQ1= " 0 ," the lockout feature is inactivated and the matched boot block can be programmed.
(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.
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