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| 型号： | EN29LV640T-90BIP |
| 厂商： | Eon Silicon Solution Inc. |
| 英文描述： | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| 中文描述： | 64兆位（8米× 8位/分x 16位）闪存引导扇区闪存，CMOS 3.0伏，只 |
| 文件页数： | 19/53页 |
| 文件大小： | 495K |
| 代理商： | EN29LV640T-90BIP |
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This Data Sheet may be revised by subsequent versions
2004 Eon Silicon Solution, Inc., www.essi.com.tw
or modifications due to changes in technical specifications.
26
EN29LV640T/B
Rev. B, Issue Date: 2007/05/16
When the Embedded Erase algorithm is completed, the device returns to reading array data and
addresses are no longer latched. The system can determine the status of the erase operation by
using DQ7, DQ6, or DQ2. Refer to “Write Operation Status” for information on these status bits.
Flowchart 4 illustrates the algorithm for the erase operation. Refer to the Erase/Program Operations
tables in the “AC Characteristics” section for parameters, and to the Sector Erase Operations Timing
diagram for timing waveforms.
Sector Erase Suspend / Resume Command
The Sector Erase Suspend command allows the system to interrupt a sector erase operation and
then read data from, or program data to, any sector not selected for erasure. This command is valid
only during the sector erase operation. The Sector Erase Suspend command is ignored if written
during the chip erase operation or Embedded Program algorithm. Addresses are don’t-cares when
writing the Sector Erase Suspend command.
When the Sector Erase Suspend command is written during a sector erase operation, the device
requires a maximum of 20 s to suspend the erase operation.
After the erase operation has been suspended, the system can read array data from or program
data to any sector not selected for erasure. Normal read and write timings and command definitions
apply. Please note that
Autoselect command sequence can not be accepted during Sector
Erase Suspend.
Reading at any address within erase-suspended sectors produces status data on DQ7–DQ0. The
system can use DQ7, or DQ6 and DQ2 together, to determine if a sector is actively erasing or is
erase-suspended. See “Write Operation Status” for information on these status bits.
After an erase-suspended program operation is complete, the system can once again read array
data within non-suspended sectors. The system can determine the status of the program operation
using the DQ7 or DQ6 status bits, just as in the standard program operation. See “Write Operation
Status” for more information. The Autoselect command is not supported during Sector Erase
Suspend Mode.
The system must write the Sector Erase Resume command (address bits are don’t-care) to exit the
sector erase suspend mode and continue the sector erase operation. Further writes of the Resume
command are ignored. Another Sector Erase Suspend command can be written after the device has
resumed erasing.
WRITE OPERATION STATUS
DQ7: DATA# Polling
The EN29LV640T/B provides DATA# polling on DQ7 to indicate the status of the embedded
operations. The DATA# Polling feature is active during the Word/Byte Programming, Sector Erase,
Chip Erase, and Sector Erase Suspend. (See Table 10)
When the embedded programming is in progress, an attempt to read the device will produce the
complement of the data written to DQ7. Upon the completion of the programming operation, an
attempt to read the device will produce the true data written to DQ7. DATA# polling is valid after the
rising edge of the fourth WE# or CE# pulse in the four-cycle sequence for program.
相关PDF资料 |
PDF描述 |
|---|---|
| EN29LV640T-90BI | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90BP | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90B | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90TIP | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
| EN29LV640T-90TI | 64 Megabit (8M x 8-bit / 4M x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EN29LV800AB-70TC | 制造商:Eon Silicon Solution Inc 功能描述: |
| EN29LV800BB-70TCP | 制造商:EON SILICON SOLUTION INC 功能描述:EN29LV800B Series, 8 Mbit 70 NS 48 TSOP 3 V Bottom Boot Sector NOR Flash |
| EN29LV800CT-70TIP | 制造商:EON SILICON SOLUTION INC 功能描述:8mb TSOP 70ns nor flash |
| EN29SL400B-90BIP | 制造商:EON SILICON SOLUTION INC 功能描述:EN29SL400 Series, 4 Mbit 90 NS 48 FBGA 1.8 V Bottom Boot Sector NOR Flash |
| EN2-B1H1 | 制造商:NEC 制造商全称:NEC 功能描述:AUTOMOTIVE RELAYS (Twin, Single) Relays |
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