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參數(shù)資料
| 型號： | 28F032B3 |
| 廠商： | Intel Corp. |
| 英文描述： | SMART 3 ADVANCED BOOT BLOCK 4-, 8-, 16-, 32-MBIT FLASH MEMORY FAMILY |
| 中文描述： | 智能高級啟動(dòng)3座4 - ，8 - ，16 - ，32 - Mbit閃存家庭 |
| 文件頁數(shù)： | 16/48頁 |
| 文件大小： | 304K |
| 代理商： | 28F032B3 |
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SMART 3 ADVANCED BOOT BLOCK
E
16
PRELIMINARY
3.2.3
READ STATUS REGISTER
The device status register indicates when a
program or erase operation is complete and the
success or failure of that operation. To read the
status register issue the Read Status Register
(70H) command to the CUI. This causes all
subsequent read operations to output data from the
status register until another command is written to
the CUI. To return to reading from the array, issue
the Read Array (FFH) command.
The status register bits are output on DQ
0
–DQ
7
.
The upper byte, DQ
8
–DQ
15
, outputs 00H during a
Read Status Register command.
The contents of the status register are latched on
the falling edge of OE# or CE#. This prevents
possible bus errors which might occur if status
register contents change while being read. CE# or
OE# must be toggled with each subsequent status
read, or the status register will not indicate
completion of a program or erase operation.
When the WSM is active, SR.7 will indicate the
status of the WSM; the remaining bits in the status
register indicate whether or not the WSM was
successful in performing the desired operation (see
Table 7).
3.2.3.1
Clearing the Status Register
The WSM sets status bits 1 through 7 to “1,” and
clears bits 2, 6 and 7 to “0,” but cannot clear status
bits 1 or 3 through 5 to “0.” Because bits 1, 3, 4 and
5 indicate various error conditions, these bits can
only be cleared through the Clear Status Register
(50H) command. By allowing the system software
to control the resetting of these bits, several
operations may be performed (such as cumulatively
programming several addresses or erasing multiple
blocks in sequence) before reading the status
register to determine if an error occurred during that
series. Clear the status register before beginning
another command or sequence. Note, again, that
the Read Array command must be issued before
data can be read from the memory array.
3.2.4
PROGRAM MODE
Programming is executed using a two
-
write
sequence. The Program Setup command (40H) is
written to the CUI followed by a second write which
specifies the address and data to be programmed.
The WSM will execute a sequence of internally
timed events to program desired bits of the
addressed location, then Verify the bits are
sufficiently programmed. Programming the memory
results in specific bits within an address location
being changed to a “0.” If the user attempts to
program “1”s, the memory cell contents do not
change and no error occurs.
The status register indicates programming status:
while the program sequence executes, status bit 7
is “0.” The status register can be polled by toggling
either CE# or OE#. While programming, the only
valid commands are Read Status Register,
Program Suspend, and Program Resume.
When programming is complete, the Program
Status bits should be checked. If the programming
operation was unsuccessful, bit SR.4 of the status
register is set to indicate a program failure. If SR.3
is set then V
PP
was not within acceptable limits, and
the WSM did not execute the program command. If
SR.1 is set, a program operation was attempted on
a locked block and the operation was aborted.
The status register should be cleared before
attempting the next operation. Any CUI instruction
can follow after programming is completed;
however, to prevent inadvertent status register
reads, be sure to reset the CUI to read array mode.
3.2.4.1
Suspending and Resuming
Program
The Program Suspend halts the in-progress
program operation to read data from another
location of memory. Once the programming process
starts, writing the Program Suspend command to
the CUI requests that the WSM suspend the
program sequence (at predetermined points in the
program algorithm). The device continues to output
status register data after the Program Suspend
command is written. Polling status register bits
SR.7 and SR.2 will determine when the program
operation has been suspended (both will be set to
“1”). t
WHRH1
/t
EHRH1
specify the program suspend
latency.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 28F032C3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3 VOLT ADVANCED+ BOOT BLOCK. 8-. 16-. 32-MBIT FLASH MEMORY FAMILY |
| 28F0330-2SR | 制造商:Steward/Laird Tech 功能描述: |
| 28F04181SR | 制造商:STEWARD 功能描述:New |
| 28F0428-0T0 | 功能描述:FERRITE FILTER 4 LINE PCB RoHS:是 類別:濾波器 >> 鐵氧體磁珠和芯片 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:EMI1812 頻率對應(yīng)阻抗:120 歐姆 @ 100MHz 額定電流:200mA DC 電阻(DCR):最大 400 毫歐 濾波器類型:差模 - 單線 封裝/外殼:1812（4532 公制） 安裝類型:表面貼裝 包裝:帶卷 (TR) 高度（最大）:0.069"（1.75mm） 尺寸/尺寸:0.177" L x 0.126" W（4.50mm x 3.20mm） 其它名稱:Q1712807A |
| 28F0430-2SR | 制造商:Laird Technologies Inc 功能描述:28F0430-2SR |
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