20
AT49BV/LV3218(T)
2452F–FLASH–10/02
Software Product Identification
Entry
(1)
Software Product Identification
Exit
(1)(6)
Notes: 1. Data Format: I/O15 - I/O8 (Don’t Care); I/O7 - I/O0 (Hex)
Address Format: A11 - A0 (Hex), A-1, and A11 - A20
(Don’t Care).
2. A1 - A20 = V
IL
.
Manufacturer Code is read for A0 = V
IL
;
Device Code is read for A0 = V
IH
.
3. The device does not remain in identification mode if pow-
ered down.
4. The device returns to standard operation mode.
5. Manufacturer Code: 1FH(x8); 001FH(x16)
Device Code: 00D8H - AT49BV/LV3218
00D9H - AT49BV/LV3218T
Either one of the Product ID Exit commands can be used.
LOAD DATA AA
TO
ADDRESS 555
LOAD DATA 55
TO
ADDRESS AAA
LOAD DATA 90
TO
ADDRESS 555
ENTER PRODUCT
IDENTIFICATION
MODE
(2)(3)(5)
LOAD DATA AA
TO
ADDRESS 555
LOAD DATA 55
TO
ADDRESS AAA
LOAD DATA F0
TO
ADDRESS 555
EXIT PRODUCT
IDENTIFICATION
MODE
(4)
OR
LOAD DATA F0
TO
ANY ADDRESS
EXIT PRODUCT
IDENTIFICATION
MODE
(4)
Sector Lockdown Enable Algorithm
(1)
Notes: 1. Data Format: I/O15 - I/O8 (Don’t Care); I/O7 - I/O0 (Hex)
Address Format: A11 - A0 (Hex), A-1, and A11 - A20
(Don’t Care).
2. Sector Lockdown feature enabled.
LOAD DATA AA
TO
ADDRESS 555
LOAD DATA 55
TO
ADDRESS AAA
LOAD DATA 80
TO
ADDRESS 555
LOAD DATA AA
TO
ADDRESS 555
LOAD DATA 55
TO
ADDRESS AAA
LOAD DATA 60
TO
SECTOR ADDRESS
PAUSE 200 µs
(2)
