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參數(shù)資料
| 型號(hào)： | M36WT864T85ZA6T |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
| 中文描述： | 64兆位4Mb的x16插槽，多銀行，突發(fā)閃存和8兆位的SRAM為512k x16，內(nèi)存產(chǎn)品多 |
| 文件頁(yè)數(shù)： | 27/92頁(yè) |
| 文件大?。?/td> | 624K |
| 代理商： | M36WT864T85ZA6T |
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M36WT864TF, M36WT864BF
FLASH STATUS REGISTER
The Flash memory contains a Status Register
which provides information on the current or previ-
ous Program or Erase operations. Issue a Read
Status Register command to read the contents of
the Status Register, refer to Read Status Register
Command section for more details. To output the
contents, the Status Register is latched and updat-
ed on the falling edge of the Chip Enable or Output
Enable signals and can be read until Chip Enable
or Output Enable returns to V
IH
. The Status Reg-
ister can only be read using single asynchronous
or single synchronous reads. Bus Read opera-
tions from any address within the bank, always
read the Status Register during Program and
Erase operations.
The various bits convey information about the sta-
tus and any errors of the operation. Bits SR7, SR6,
SR2 and SR0 give information on the status of the
device and are set and reset by the device. Bits
SR5, SR4, SR3 and SR1 give information on er-
rors, they are set by the device but must be reset
by issuing a Clear Status Register command or a
hardware reset. If an error bit is set to ‘1’ the Status
Register should be reset before issuing another
command. SR7 to SR1 refer to the status of the
device while SR0 refers to the status of the ad-
dressed bank.
The bits in the Status Register are summarized in
Table 8, Status Register Bits. Refer to Table 8 in
conjunction with the following text descriptions.
Program/Erase Controller Status Bit (SR7).
The Program/Erase Controller Status bit indicates
whether the Program/Erase Controller is active or
inactive in any bank. When the Program/Erase
Controller Status bit is Low (set to ‘0’), the Pro-
gram/Erase Controller is active; when the bit is
High (set to ‘1’), the Program/Erase Controller is
inactive, and the device is ready to process a new
command.
The Program/Erase Controller Status is Low im-
mediately after a Program/Erase Suspend com-
mand is issued until the Program/Erase Controller
pauses. After the Program/Erase Controller paus-
es the bit is High.
During Program, Erase, operations the Program/
Erase Controller Status bit can be polled to find the
end of the operation. Other bits in the Status Reg-
ister should not be tested until the Program/Erase
Controller completes the operation and the bit is
High.
After the Program/Erase Controller completes its
operation the Erase Status, Program Status, V
PPF
Status and Block Lock Status bits should be tested
for errors.
Erase Suspend Status Bit (SR6).
The
Suspend Status bit indicates that an Erase opera-
Erase
tion has been suspended or is going to be sus-
pended in the addressed block. When the Erase
Suspend Status bit is High (set to ‘1’), a Program/
Erase Suspend command has been issued and
the memory is waiting for a Program/Erase Re-
sume command.
The Erase Suspend Status should only be consid-
ered valid when the Program/Erase Controller Sta-
tus bit is High (Program/Erase Controller inactive).
SR7 is set within the Erase Suspend Latency time
of the Program/Erase Suspend command being
issued therefore the memory may still complete
the operation rather than entering the Suspend
mode.
When a Program/Erase Resume command is is-
sued the Erase Suspend Status bit returns Low.
Erase Status Bit (SR5).
The Erase Status bit
can be used to identify if the memory has failed to
verify that the block or bank has erased correctly.
When the Erase Status bit is High (set to ‘1’), the
Program/Erase Controller has applied the maxi-
mum number of pulses to the block or bank and
still failed to verify that it has erased correctly. The
Erase Status bit should be read once the Program/
Erase Controller Status bit is High (Program/Erase
Controller inactive).
Once set High, the Erase Status bit can only be re-
set Low by a Clear Status Register command or a
hardware reset. If set High it should be reset be-
fore a new Program or Erase command is issued,
otherwise the new command will appear to fail.
Program Status Bit (SR4).
The Program Status
bit is used to identify a Program failure. When the
Program Status bit is High (set to ‘1’), the Pro-
gram/Erase Controller has applied the maximum
number of pulses to the byte and still failed to ver-
ify that it has programmed correctly. The Program
Status bit should be read once the Program/Erase
Controller Status bit is High (Program/Erase Con-
troller inactive).
Once set High, the Program Status bit can only be
reset Low by a Clear Status Register command or
a hardware reset. If set High it should be reset be-
fore a new command is issued, otherwise the new
command will appear to fail.
V
PPF
Status Bit (SR3).
The V
PPF
Status bit can
be used to identify an invalid voltage on the V
PPF
pin during Program and Erase operations. The
V
PPF
pin is only sampled at the beginning of a Pro-
gram or Erase operation. Indeterminate results
can occur if V
PPF
becomes invalid during an oper-
ation.
When the V
PPF
Status bit is Low (set to ‘0’), the
voltage on the V
PPF
pin was sampled at a valid
voltage; when the V
PPF
Status bit is High (set to
‘1’), the V
PPF
pin has a voltage that is below the
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M36WT864B10ZA6T | 64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
| M36WT864BF | 64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
| M36WT864T10ZA6T | 64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
| M36WT864TF | 64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
| M36WT864B85ZA6T | 64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M36WT864TF | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
| M36WT864TF70ZA6T | 功能描述:組合存儲(chǔ)器 64M (4Mx16) 70ns RoHS:否 制造商:Microchip Technology 組織:512 K x 16 電源電壓-最大: 電源電壓-最小: 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:LFBGA-48 封裝:Tray |
| M36WT864TFZA | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
| M36WT8B10ZA6T | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
| M36WT8B70ZA6T | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:64 Mbit 4Mb x16, Multiple Bank, Burst Flash Memory and 8 Mbit 512K x16 SRAM, Multiple Memory Product |
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