參數(shù)資料
型號： GE28F128W30T90
英文描述： EEPROM|FLASH|8MX16|CMOS|BGA|60PIN|PLASTIC
中文描述： 的EEPROM | FLASH動畫| 8M × 16位|的CMOS | BGA封裝| 60PIN |塑料
文件頁數(shù)： 24/91頁
文件大小： 994K
代理商： GE28F128W30T90
1.8 Volt Intel
Wireless Flash Memory with 3 Volt I/O
24
Datasheet
4.5
Clear Status Register
The Clear Status Register command clears the status register and leaves all partition output states
unchanged. The WSM can set all status register bits and clear bits SR[7:6,2,0]. Because bits
SR[5,4,3,1] indicate various error conditions, they can only be cleared by the Clear Status Register
command. By allowing system software to reset these bits, several operations (such as
cumulatively programming several addresses or erasing multiple blocks in sequence) can be
performed before reading the status register to determine error occurrence. If an error is detected,
the Status Register must be cleared before beginning another command or sequence. Device reset
(RST# = V
IL
) also clears the status register. This command functions independently of V
PP.
5.0
Program Operations
5.1
Word Program
When the Word Program command is issued, the WSM executes a sequence of internally timed
events to program a word at the desired address and verify that the bits are sufficiently
programmed. Programming the flash array changes specifically addressed bits to 0; 1 bits do not
change the memory cell contents.
Programming can occur in only one partition at a time. All other partitions must be in either a read
mode or erase suspend mode. Only one partition can be in erase suspend mode at a time.
The status register can be examined for program progress by reading any address within the
partition that is busy programming. However, while most status register bits are partition-specific,
the Device WSM Status bit, SR[7], is
device
-specific; that is, if the status register is read from any
other partition, SR[7] indicates program status of the entire device. This permits the system CPU to
monitor program progress while reading the status of other partitions.
CE# or OE# toggle (during polling) updates the status register. Several commands can be issued to
a partition that is programming: Read Status Register, Program Suspend, Read Identifier, and Read
Query. The Read Array command can also be issued, but the read data is indeterminate.
Table 10. Status Register Device WSM and Partition Write Status Description
DWS
(SR[7])
PWS
(SR[0])
Description
0
0
The addressed partition is performing a program/erase operation.
EFP: device has finished programming or verifying data, or is ready for data.
0
1
A partition other than the one currently addressed is performing a program/erase operation.
EFP: the device is either programming or verifying data.
1
0
No program/erase operation is in progress in any partition. Erase and Program suspend bits (SR[6,2])
indicate whether other partitions are suspended.
EFP: the device has exited EFP mode.
1
1
Won’t occur in standard program or erase modes.
EFP: this combination does not occur.
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