參數(shù)資料
型號(hào)： GE28F128W30B90
英文描述： CHIP RESISTOR
中文描述： 的EEPROM | FLASH動(dòng)畫| 8M × 16位|的CMOS | BGA封裝| 60PIN |塑料
文件頁數(shù)： 40/91頁
文件大?。?/td> 994K
代理商： GE28F128W30B90
1.8 Volt Intel
Wireless Flash Memory with 3 Volt I/O
40
Datasheet
register is locked, however, the entire user segment is locked and no more user bits can be
programmed.
The protection register shares some of the same internal flash resources as the parameter partition.
Therefore, RWW is only allowed between the protection register and main partitions.
Table 12
describes the operations allowed in the protection register, parameter partition, and main partition
during RWW and RWE.
7.2.1
Reading the Protection Register
Writing the Read Identifier command allows the protection register data to be read 16 bits at a time
from addresses shown in
Table 7, “Device Identification Codes” on page 22
. The protection
register is read from the Read Identifier command and can be read in any partition.Writing the
Read Array command returns the device to read-array mode.
7.2.2
Programing the Protection Register
The Protection Program command should be issued only at the bottom partition followed by the
data to be programmed at the specified location. It programs the upper 64 bits of the protection
register 16 bits at a time.
Table 7, “Device Identification Codes” on page 22
shows allowable
addresses. See also
Figure 12, “Protection Register Programming Flowchart” on page 41
. Issuing a
Protection Program command outside the register’s address space results in a status register error
(SR[4]=1).
Table 12. Simultaneous Operations Allowed with the Protection Register
Protection
Register
Parameter
Partition
Array Data
Main
Partitions
Description
Read
See
Description
Write/Erase
While programming or erasing in a main partition, the protection register can be
read from any other partition. Reading the parameter partition data is not
allowed if the protection register is being read from addresses within the
parameter partition.
See
Description
Read
Write/Erase
While programming or erasing in a main partition, read operations are allowed
in the parameter partition. Accessing the protection registers from parameter
partition addresses is not allowed.
Read
Read
Write/Erase
While programming or erasing in a main partition, read operations are allowed
in the parameter partition. Accessing the protection registers in a partition that
is
different
from the one being programmed or erased, and also
different
from
the parameter partition, is allowed.
Write
No Access
Allowed
Read
While programming the protection register, reads are only allowed in the other
main partitions. Access to the parameter partition is not allowed. This is
because programming of the protection register can only occur in the
parameter partition, so it will exist in status mode.
No Access
Allowed
Write/Erase
Read
While programming or erasing the parameter partition, reads of the protection
registers are not allowed in
any
partition. Reads in other main partitions are
supported.
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