AT49BV161-90TI Atmel, AT49BV161-90TI Datasheet - Page 8

• Manufacturer Part Number: AT49BV161-90TI
• Description: IC FLASH 16MBIT 90NS 48TSOP
• Manufacturer: Atmel

Specifications of AT49BV161-90TI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 16M (2M x 8 or 1M x 16)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 2.65 V ~ 3.3 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SECTOR LOCKDOWN OVERRIDE: The only way to unlock a sector that is locked down is
through reset or power-up cycles. After power-up or reset, the content of a sector that is
locked down can be erased and reprogrammed.
ERASE SUSPEND/ERASE RESUME: The Erase Suspend command allows the system to
interrupt a sector erase or chip erase operation and then program or read data from a different
sector within the memory. After the Erase Suspend command is given, the device requires a
maximum time of 15 µs to suspend the erase operation. After the erase operation has been
suspended, the system can then read data or program data to any other sector within the
device. An address is not required during the Erase Suspend command. During a sector erase
suspend, another sector cannot be erased. To resume the sector erase operation, the system
must write the Erase Resume command. The Erase Resume command is a one-bus cycle
command. The device also supports an erase suspend during a complete chip erase. While
the chip erase is suspended, the user can read from any sector within the memory that is pro-
tected. The command sequence for a chip erase suspend and a sector erase suspend are the
same.
PROGRAM SUSPEND/PROGRAM RESUME: The Program Suspend command allows the
system to interrupt a programming operation and then read data from a different byte/word
within the memory. After the Program Suspend command is given, the device requires a max-
imum of 15 µs to suspend the programming operation. After the programming operation has
been suspended, the system can then read data from any other byte/word within the device.
An address is not required during the program suspend operation. To resume the program-
ming operation, the system must write the Program Resume command. The program suspend
and resume are one-bus cycle commands. The command sequence for the erase suspend
and program suspend are the same, and the command sequence for the erase resume and
program resume are the same.
PRODUCT IDENTIFICATION: The product identification mode identifies the device and man-
ufacturer as Atmel. It may be accessed by hardware or software operation. The hardware
operation mode can be used by an external programmer to identify the correct programming
algorithm for the Atmel product.
For details, see “Operating Modes” on page 17 (for hardware operation) or “Software Product
Identification Entry/Exit” on page 24. The manufacturer and device codes are the same for
both modes.
128-BIT PROTECTION REGISTER: The AT49BV/LV16X(T) contains a 128-bit register that
can be used for security purposes in system design. The protection register is divided into two
64-bit blocks. The two blocks are designated as block A and block B. The data in block A is
non-changeable and is programmed at the factory with a unique number. The data in block B
is programmed by the user and can be locked out such that data in the block cannot be repro-
grammed. To program block B in the protection register, the four-bus cycle Program
Protection Register command must be used as shown in the “Command Definition in Hex”
table on page 13. To lock out block B, the four-bus cycle Lock Protection Register command
must be used as shown in the “Command Definition in Hex” table on page 13. Data bit D1
must be zero during the fourth bus cycle. All other data bits during the fourth bus cycle are
don’t cares. To determine whether block B is locked out, the Product ID Entry command is
given followed by a read operation from address 80H. If data bit D1 is zero, block B is locked.
If data bit D1 is one, block B can be reprogrammed. Please see the “Protection Register
Addressing Table” on page 14 for the address locations in the protection register. To read the
protection register, the Product ID Entry command is given followed by a normal read opera-
tion from an address within the protection register. After determining whether block B is
protected or not, or reading the protection register, the Product ID Exit command must be
given prior to performing any other operation.
AT49BV/LV160(T)/161(T)
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1427L–FLASH–02/03