AT49BV160C-70TI 查看數據表（PDF） - Atmel Corporation

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AT49BV160C-70TI

16-megabit (1M x 16) 3-volt Only Flash Memory

Atmel Corporation 

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

I/O0

Sector Protection Status

0

0

Sector Not Locked

0

1

Softlock Enabled

1

0

Hardlock Enabled

1

1

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 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

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 µs 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 a software operation. For details, see “Operating

Modes” on page 19.

128-BIT PROTECTION REGISTER: The AT49BV160C(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 “Command Definition” table on

page 15. To lock out sector B, the two-bus cycle Lock Protection Register command must be

used as shown in the “Command Definition” table. Data bit D1 must be zero during the second

bus cycle. All other data bits during the second bus cycle are don’t 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

“Protection Register Addressing Table” on page 16 for the address locations in the protection

8 AT49BV160C(T)

3367D–FLASH–5/04

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