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| 型号： | AM29F400BB-90EC |
| 厂商： | SPANSION LLC |
| 元件分类： | PROM |
| 英文描述： | Flash Memory IC; Access Time, Tacc:90ns; Package/Case:48-TSOP; Leaded Process Compatible:No; Memory Configuration:256K x 16 / 512K x 8; Memory Size:4Mbit; Peak Reflow Compatible (260 C):No; Supply Voltage Max:5.5V RoHS Compliant: No |
| 中文描述： | 256K X 16 FLASH 5V PROM, 90 ns, PDSO48 |
| 封装： | MO-142DD, TSOP-48 |
| 文件页数： | 10/43页 |
| 文件大小： | 865K |
| 代理商： | AM29F400BB-90EC |
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16
Am29F400B
21505E6 March 3, 2009
D A TA
SH EE T
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 s 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 s 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 “The Erase Resume command is valid
only during the Erase Suspend mode.” 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 “The Erase Resume command is valid only
during the Erase Suspend mode.” 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 3.
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 |
|---|---|
| AM29F400BB-90ED | Flash Memory IC; Memory Size:4Mbit; Memory Configuration:256K x 16 / 512K x 8; Package/Case:48-TSOP; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes; Supply Voltage Max:5V; Access Time, Tacc:90ns RoHS Compliant: Yes |
| AM29F400BT-120EF | Flash Memory IC; Leaded Process Compatible:Yes; Memory Size:4Mbit; Package/Case:48-TSOP; Peak Reflow Compatible (260 C):Yes; Supply Voltage Max:5V; Access Time, Tacc:120ns; Series:AM29 RoHS Compliant: Yes |
| AM29F400BT-55ED | Flash Memory IC; Leaded Process Compatible:Yes; Memory Size:4Mbit; Package/Case:48-TSOP; Peak Reflow Compatible (260 C):Yes; Supply Voltage Max:5V; Access Time, Tacc:55ns; Series:AM29 RoHS Compliant: Yes |
| AM29F400BT-70EC | Flash Memory IC; Access Time, Tacc:70ns; Package/Case:48-TSOP; Leaded Process Compatible:No; Memory Configuration:256K x 16 / 512K x 8; Peak Reflow Compatible (260 C):No; Supply Voltage Max:5.5V; Mounting Type:Surface Mount RoHS Compliant: No |
| AM29F400BT-70ED | Flash Memory IC; Memory Configuration:256K x 16 / 512K x 8; Package/Case:48-TSOP; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes; Supply Voltage Max:5.5V; Access Time, Tacc:70ns; Mounting Type:Surface Mount RoHS Compliant: Yes |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AM29F400BB-90ED | 制造商:Spansion 功能描述:FLASH BOTTOM BLOCK 4MB SMD 29F400 |
| AM29F400BB-90EF | 功能描述:闪存 4M (512KX8/256Kx16) Parallel NOR Fl 5V RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| AM29F400-BB90EI | 制造商:Advanced Micro Devices 功能描述: |
| AM29F400BB-90EI | 制造商:Spansion 功能描述:NOR Flash Parallel 5V 4Mbit 512K/256K x 8bit/16bit 90ns 48-Pin TSOP 制造商:Spansion 功能描述:4M CMOS FLASH 5V 制造商:Advanced Micro Devices 功能描述:NOR Flash, 256K x 16, 48 Pin, Plastic, TSSOP |
| AM29F400BB-90EK | 制造商:Spansion 功能描述: |
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