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AT49BV320C-70CI Datasheet

  • AT49BV320C-70CI

  • ATMEL Corporation [32-megabit (2M x 16) 3-volt Only Flash M...

  • ATMEL   ATMEL

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SECTOR PROTECTION DETECTION:
A software method is available to determine if the sec-
tor protection Softlock or Hardlock features are enabled. When the device is in the software
product identification mode, a read from the I/O0 and I/O1 at address location 00002H within a
sector will show if the sector is unlocked, softlocked, or hardlocked.
Table 3.
Sector Protection Status
I/O1
0
0
1
1
I/O0
0
1
0
1
Sector Protection Status
Sector Not Locked
Softlock Enabled
Hardlock Enabled
Both Hardlock and Softlock Enabled
ERASE SUSPEND/ERASE RESUME:
The Erase Suspend command allows the system to
interrupt a sector 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 碌s 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
only valid commands while erase is suspended are Read Status Register, Product ID Entry,
CFI Query, Program, Program Resume, Erase Resume, Sector Softlock/Hardlock, Sector
Unlock.
PROGRAM SUSPEND/PROGRAM RESUME:
The Program Suspend command allows the
system to interrupt a programming operation and then read data from a different word within
the memory. After the Program Suspend command is given, the device requires a maximum
of 20 碌s to suspend the programming operation. After the programming operation has been
suspended, the system can then read data from any other word within the device. An address
is not required during the program suspend operation. To resume the programming 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 sus-
pend are the same and the command sequence for the erase resume and program resume
are the same. The only other valid commands while program is suspended are Read Status
Register, Product ID Entry, CFI Query and Program Resume.
PRODUCT IDENTIFICATION:
The product identification mode identifies the device and man-
ufacturer as Atmel. It may be accessed by a software operation. For details, see 鈥淥perating
Modes鈥?on page 21.
128-BIT PROTECTION REGISTER:
The AT49BV320C(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 sectors. The two sectors are designated as sector A and sector B. The data in sector A is
non-changeable and is programmed at the factory with a unique number. The data in sector B
is programmed by the user and can be locked out such that data in the sector cannot be repro-
grammed. To program sector B in the protection register, the two-bus cycle Program
Protection Register command must be used as shown in the 鈥淐ommand Definition鈥?table on
page 15. To lock out sector B, the two-bus cycle Lock Protection Register command must be
used as shown in the 鈥淐ommand Definition鈥?table. Data bit D1 must be zero during the second
bus cycle. All other data bits during the second bus cycle are don鈥檛 cares. To determine
whether sector B is locked out, use the status of sector B protection command. If data bit D1 is
zero, sector B is locked. If data bit D1 is one, sector B can be reprogrammed. Please see the
鈥淧rotection Register Addressing Table鈥?on page 16 for the address locations in the protection
8
AT49BV320C(T)
3372D鈥揊LASH鈥?/04

AT49BV320C-70CI 產(chǎn)品屬性

  • 276

  • 集成電路 (IC)

  • 存儲(chǔ)器

  • -

  • 閃存

  • FLASH

  • 32M（2M x 16）

  • 70ns

  • 并聯(lián)

  • 2.65 V ~ 3.6 V

  • -40°C ~ 85°C

  • 47-CBGA

  • 47-CBGA（7x10）

  • 托盤

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