11
3631A–FLASH–04/06
AT49BV642D(T)
Notes: 1. The DATA FORMAT in each bus cycle is as follows: I/O15 - I/O8 (Don’t Care); I/O7 - I/O0 (Hex). The ADDRESS FORMAT in
each bus cycle is as follows: A11 - A0 (Hex), A11 - A21 (Don’t Care).
2. Since A11 is a Don’t Care, AAA can be replaced with 2AA.
3. SA = sector address. Any word address within a sector can be used to designate the sector address (see pages 13 - 16
for details).
4. The fast programming option enables the user to program two words in parallel only when V
PP
= 10V. The addresses, Addr0
and Addr1, of the two words, D
IN0
and D
IN1
, must only differ in address A0. This command should be used for manufacturing
purpose only.
5. Once a sector is in the lockdown mode, the data in the protected sector cannot be changed, unless the chip is reset or power
cycled.
6. During the fourth bus cycle, the manufacturer code is read from address 00000H, the device code is read from address
00001H, and the data in the protection register is read from addresses 000081H - 000088H.
7. Either one of the Product ID Exit commands can be used.
8. Bytes of data other than F0 may be used to exit the product ID mode. However, it is recommended that F0 be used.
9. Any address within the user programmable register region. Please see “Protection Register Addressing Table” on page 12.
10. If data bit D1 is “0”, block B is locked. If data bit D1 is “1”, block B can be reprogrammed.
11. The default state (after power-up) of the configuration register is “00”.
5. Command Definition Table
Command Sequence
Bus
Cycles
1st Bus
Cycle
2nd Bus
Cycle
3rd Bus
Cycle
4th Bus
Cycle
5th Bus
Cycle
6th Bus
Cycle
Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data
Read 1 Addr D
OUT
Chip Erase 6 555 AA AAA
(2)
55 555 80 555 AA AAA 55 555 10
Sector Erase 6 555 AA AAA 55 555 80 555 AA AAA 55 SA
(3)
30
Word Program 4 555 AA AAA 55 555 A0 Addr D
IN
Dual-Word Program
(4)
5 555 AA AAA 55 555 E0 Addr0 D
IN0
Addr1 D
IN1
Enter Single-pulse Program
Mode
6 555 AA AAA 55 555 80 555 AA AAA 55 555 A0
Single-pulse Word Program
Mode
1 Addr D
IN
Sector Lockdown
(5)
6 555 AA AAA 55 555 80 555 AA AAA 55 SA
(3)(5)
60
Erase/Program Suspend 1 xxx B0
Erase/Program Resume 1 xxx 30
Product ID Entry
(6)
3 555 AA AAA 55 555 90
Product ID Exit
(7)
3 555 AA AAA 55 555 F0
(8)
Product ID Exit
(7)
1 xxx F0
(8)
Program Protection
Register – Block B
4 555 AA AAA 55 555 C0 Addr
(9)
D
IN
Lock Protection
Register – Block B
4 555 AA AAA 55 555 C0 80 X0
Status of Block B
Protection
4 555 AA AAA 55 555 90 80 D
OUT
(10)
Set Configuration Register 4 555 AA AAA 55 555 D0 xxx 00/01
(11)
CFI Query 1 X55 98
