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参数资料
| 型号： | AM29LV004B-1 |
| 厂商： | Advanced Micro Devices, Inc. |
| 英文描述： | 4 Megabit (512 K x 8-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
| 中文描述： | 4兆位（512亩× 8位）的CMOS 3.0伏，只引导扇区闪存 |
| 文件页数： | 17/40页 |
| 文件大小： | 769K |
| 代理商： | AM29LV004B-1 |
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Am29LV004B
sector erase operation immediately terminates the
operation. The Sector Erase command sequence
should be reinitiated once the device has returned to
reading array data, to ensure data integrity.
When the Embedded Erase algorithm is complete, 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, DQ2,
or RY/BY#. (Refer to “Write Operation Status” for infor-
mation on these status bits.)
Figure 4 illustrates the algorithm for the erase opera-
tion. Refer to the Erase/Program Operations tables in
the “AC Characteristics” section for parameters, and to
Figure 16 for timing diagrams.
Erase Suspend/Erase Resume Commands
The 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, including the 50 μs time-out period
during the sector erase command sequence. The
Erase Suspend command is ignored if written during
the chip erase operation or Embedded Program algo-
rithm. Writing the Erase Suspend command during the
Sector Erase time-out immediately terminates the
time-out period and suspends the erase operation.
Addresses are “don’t-cares” when writing the Erase
Suspend command.
When the Erase Suspend command is written during a
sector erase operation, the device requires a maximum
of 20 μs to suspend the erase operation. However,
when the Erase Suspend command is written during
the sector erase time-out, the device immediately ter-
minates the time-out period and suspends 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. (The device “erase
suspends” all sectors selected for erasure.) Normal
read and write timings and command definitions apply.
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-sus-
pended. See “Write Operation Status” for information
on these status bits.
After an erase-suspended program operation is com-
plete, 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 oper-
ation. See “Write Operation Status” for more
information.
The system may also write the autoselect command
sequence when the device is in the Erase Suspend
mode. The device allows reading autoselect codes
even at addresses within erasing sectors, since the
codes are not stored in the memory array. When the
device exits the autoselect mode, the device reverts to
the Erase Suspend mode, and is ready for another
valid operation. See “Autoselect Command Sequence”
for more information.
The system must write the Erase Resume command
(address bits are “don’t care”) to exit the erase suspend
mode and continue the sector erase operation. Further
writes of the Resume command are ignored. Another
Erase Suspend command can be written after the
device has resumed erasing.
Notes:
1. See Table 5 for erase command sequence.
2.
See “DQ3: Sector Erase Timer” for more information.
Figure 4.
Erase Operation
START
Write Erase
Command Sequence
Data Poll
from System
Data = FFh
No
Yes
Erasure Completed
Embedded
Erase
algorithm
in progress
相关PDF资料 |
PDF描述 |
|---|---|
| AM29LV004BT-120FE | SWITCH KEYLOCK SPDT 1A 90DEG |
| AM29LV004BT-120FI | SWITCH KEYLOCK SP3T 4A 45DEG |
| AM29LV004BB-70EC | Ceramic Conformally Coated / Radial 'Standard & High Voltage Golden Max'; Capacitance [nom]: 180pF; Working Voltage (Vdc)[max]: 500V; Capacitance Tolerance: +/-10%; Dielectric: Multilayer Ceramic, Conformally Coated; Temperature Coefficient: X7R; Lead Style: Radial Leaded; Lead Dimensions: 0.100" Lead Spacing; Body Dimensions: 0.150" x 0.210" x 0.130"; Container: Bag; Qty per Container: 500 |
| Am29LV004BT-70EE | Ceramic Conformally Coated / Radial 'Standard & High Voltage Golden Max'; Capacitance [nom]: 200pF; Working Voltage (Vdc)[max]: 100V; Capacitance Tolerance: +/-5%; Dielectric: Multilayer Ceramic, Conformally Coated; Temperature Coefficient: C0G (NP0); Lead Style: Radial Leaded; Lead Dimensions: 0.100" Lead Spacing; Body Dimensions: 0.150" x 0.210" x 0.130"; Container: Bag; Qty per Container: 500 |
| AM29LV004BB-120EC | 4 Megabit (512 K x 8-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AM29LV004BB-120EC | 制造商:Advanced Micro Devices 功能描述:NOR Flash, 512K x 8, 40 Pin, Plastic, TSSOP |
| AM29LV004BB-120EI | 制造商:Rochester Electronics LLC 功能描述: 制造商:Advanced Micro Devices 功能描述:NOR Flash, 512K x 8, 40 Pin, Plastic, TSSOP |
| AM29LV004BB120EI\T | 制造商:Advanced Micro Devices 功能描述:4 Mb (512K x 8) Boot Sector, Flash Memory |
| AM29LV004BB-120EIT | 制造商:Rochester Electronics LLC 功能描述: 制造商:Advanced Micro Devices 功能描述: |
| am29lv004bt-120ed | 制造商:Advanced Micro Devices 功能描述: |
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