at49bv3218 ATMEL Corporation, at49bv3218 Datasheet - Page 7

• Manufacturer Part Number: at49bv3218
• Description: 32-megabit 2mx16/4mx8 3-volt Only Flash Memory
• Manufacturer: ATMEL Corporation

Command Definition in Hex
Notes:
Absolute Maximum Ratings*
2452F–FLASH–10/02
Read
Chip Erase
Sector Erase
Byte/Word Program
Enter Single Pulse
Program Mode
Single Pulse
Byte/Word Program
Sector Lockdown
Erase Suspend
Erase Resume
Product ID Entry
Product ID Exit
Product ID Exit
Program Protection
Register
Lock Protection
Register - Block B
Status of Block B
Protection
Temperature under Bias ................................ -55°C to +125°C
Storage Temperature ..................................... -65°C to +150°C
All Input Voltages
(including NC Pins)
with Respect to Ground ...................................-0.6V to +6.25V
All Output Voltages
with Respect to Ground .............................-0.6V to V
Voltage on OE and V
with Respect to Ground ...................................-0.6V to +13.0V
Command
Sequence
1. The DATA FORMAT shown for each bus cycle is as follows; I/O7 - I/O0 (Hex). In word operation I/O15 - I/O8 are Don’t Care.
2. Since A11 is a Don’t Care, AAA can be replaced with 2AA.
3. SA = sector address. Any byte/word address within a sector can be used to designate the sector address (see pages 9 -12
4. Once a sector is in the lockdown mode, data in the protected sector cannot be changed unless the chip is reset or power
5. PA is the plane address (A20 - A19).
6. Either one of the Product ID Exit commands can be used.
7. If data bit D1 is “0”, block B is locked. If data bit D1 is “1”, block B can be reprogrammed.
The ADDRESS FORMAT shown for each bus cycle is as follows: A11 - A0 (Hex). Address A20 through A11 are Don’t Care
in the word mode. Address A20 through A11 and A-1 are Don’t Care in the byte mode.
for details).
cycled.
(6)
(6)
Cycles
PP
Bus
1
6
6
4
6
1
6
1
1
3
3
1
4
4
4
Addr
Addr
Addr
PA
XXX
XXX
555
555
555
555
555
555
555
555
555
555
1st Bus
(5)
Cycle
Data
D
D
AA
AA
AA
AA
AA
B0
AA
AA
AA
AA
AA
30
F0
OUT
IN
(1)
AAA
Addr
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
AAA
2nd Bus
Cycle
(2)
CC
+ 0.6V
Data
55
55
55
55
55
55
55
55
55
55
Addr
555
555
555
555
555
555
555
555
555
555
3rd Bus
Cycle
*NOTICE:
Data
A0
C0
C0
80
80
80
80
90
F0
90
Addr
Addr
Addr
555
555
555
555
080
80
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
4th Bus
Cycle
D
Data
OUT
AA
AA
D
AA
AA
D
X0
AT49BV/LV3218(T)
IN
IN
(7)
Addr
AAA
AAA
AAA
AAA
5th Bus
Cycle
Data
55
55
55
55
SA
SA
Addr
555
555
(3)(4)
(3)(4)
6th Bus
Cycle
Data
A0
10
30
60
7