- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374649 > S29AL004D (Spansion Inc.) 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory PDF資料下載
參數(shù)資料
| 型號： | S29AL004D |
| 廠商： | Spansion Inc. |
| 英文描述： | 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| 中文描述： | 4兆位（512 kX的8-Bit/256畝x 16位），3.0伏的CMOS只引導(dǎo)扇區(qū)閃存 |
| 文件頁數(shù)： | 28/55頁 |
| 文件大?。?/td> | 1481K |
| 代理商： | S29AL004D |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當(dāng)前第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁
26
S29AL004D
S29AL004D_00_A1 February 18, 2005
A d v a n c e I n f o r m a t i o n
Write Operation Status
The device provides several bits to determine the status of a write operation:
DQ2, DQ3, DQ5, DQ6, DQ7, and RY/BY#.
Table 6 on page 31
and the following
subsections describe the functions of these bits. DQ7, RY/BY#, and DQ6 each
offer a method for determining whether a program or erase operation is complete
or in progress. These three bits are discussed first.
DQ7: Data# Polling
The Data# Polling bit, DQ7, indicates to the host system whether an Embedded
Algorithm is in progress or completed, or whether the device is in Erase Suspend.
Data# Polling is valid after the rising edge of the final WE# pulse in the program
or erase command sequence.
During the Embedded Program algorithm, the device outputs on DQ7 the com-
plement of the datum programmed to DQ7. This DQ7 status also applies to
programming during Erase Suspend. When the Embedded Program algorithm is
complete, the device outputs the datum programmed to DQ7. The system must
provide the program address to read valid status information on DQ7. If a pro-
gram address falls within a protected sector, Data# Polling on DQ7 is active for
approximately 1 μs, then the device returns to reading array data.
During the Embedded Erase algorithm, Data# Polling produces a
0
on DQ7. When
the Embedded Erase algorithm is complete, or if the device enters the Erase Sus-
pend mode, Data# Polling produces a
1
on DQ7. This is analogous to the
complement/true datum output described for the Embedded Program algorithm:
the erase function changes all the bits in a sector to
1
; prior to this, the device
outputs the
complement
, or
0
. The system must provide an address within any
of the sectors selected for erasure to read valid status information on DQ7.
After an erase command sequence is written, if all sectors selected for erasing
are protected, Data# Polling on DQ7 is active for approximately 100 μs, then the
device returns to reading array data. If not all selected sectors are protected, the
Embedded Erase algorithm erases the unprotected sectors, and ignores the se-
lected sectors that are protected.
When the system detects DQ7 has changed from the complement to true data,
it can read valid data at DQ7–DQ0 on the
following
read cycles. This is because
DQ7 may change asynchronously with DQ0–DQ6 while Output Enable (OE#) is
asserted low.
Figure 19, on page 44
, Data# Polling Timings (During
Embedded Algorithms), in
AC Characteristics on page 37
illustrates this.
Table 6 on page 31
shows the outputs for Data# Polling on DQ7.
Figure 5, on
page 27
shows the Data# Polling algorithm.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S29AL004D90BAI012 | 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL004D90BAI013 | 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL004D90BAI020 | 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL004D90BAI022 | 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| S29AL004D90BAI023 | 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S29AL004D55MAIR10 | 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 4MBIT 512KX8/256KX16 55NS 44SOP - Rail/Tube |
| S29AL004D55MAIR20 | 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 4MBIT 512KX8/256KX16 55NS 44SOP - Rail/Tube |
| S29AL004D55TAI010 | 制造商:Spansion 功能描述: |
| S29AL004D55TAI020 | 制造商:Spansion 功能描述:IC,EEPROM,NOR FLASH,256KX16/512KX8,CMOS,TSSOP,48PIN,PLASTIC |
| S29AL004D55TAIR10 | 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 4MBIT 512KX8/256KX16 55NS 48TSOP - Trays |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。