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参数资料
| 型号： | AT49LV1025 |
| 厂商： | Atmel Corp. |
| 英文描述： | 1-megabit 3-volt Only Flash Memory(1M位 3V闪速存储器) |
| 中文描述： | 1兆位3伏，只有闪存（100万位3V的闪速存储器） |
| 文件页数： | 3/13页 |
| 文件大小： | 253K |
| 代理商： | AT49LV1025 |
AT49LV1024/1025
3
size of the block is 8K words. This block, referred to as the
boot block, can contain secure code that is used to bring up
the system. Enabling the lockout feature will allow the boot
code to stay in the device while data in the rest of the
device is updated. This feature does not have to be acti-
vated; the boot block
’
s usage as a write-protected region is
optional to the user. The address range of the boot block is
0000H to 1FFFH.
Once the feature is enabled, the data in the boot block can
no longer be erased or programmed. Data in the main
memory block can still be changed through the regular pro-
gramming method and can be erased using either the Chip
Erase or the Main Memory Block Erase command. To acti-
vate the lockout feature, a series of six program commands
to specific addresses with specific data must be performed.
Please refer to the Command Definitions table.
BOOT BLOCK LOCKOUT DETECTION:
A software
method is available to determine if programming of the boot
block section is locked out. When the device is in the soft-
ware product identification mode (see Software Product
Identification Entry and Exit sections) a read from address
location 0002H will show if programming the boot block is
locked out. If the data on I/O0 is low, the boot block can be
programmed; if the data on I/O0 is high, the program lock-
out feature has been activated and the block cannot be
programmed. The software product identification exit code
should be used to return to standard operation.
PRODUCT IDENTIFICATION:
The product identification
mode identifies the device and manufacturer as Atmel. It
may be accessed by hardware or software operation. The
hardware operation mode can be used by an external
programmer to identify the correct programming algorithm
for the Atmel product.
For details, see
“
Operating Modes
”
(for hardware opera-
tion) or
“
Software Product Identification Entry/Exit
”
on
page 10. The manufacturer and device code is the same
for both modes.
DATA POLLING:
The AT49LV1024/1025 features Data
Polling to indicate the end of a program or erase cycle. Dur-
ing a program cycle an attempted read of the last byte
loaded will result in the complement of the loaded data on
I/O7. Once the program cycle has been completed, true
data is valid on all outputs and the next cycle may begin.
Data Polling may begin at any time during the program
cycle.
TOGGLE BIT:
In addition to Data Polling, the
AT49LV1024/1025 provides another method for determin-
ing the end of a program or erase cycle. During a program
or erase operation, successive attempts to read data from
the device will result in I/O6 toggling between one and
zero. Once the program cycle has completed, I/O6 will stop
toggling and valid data will be read. Examining the toggle
bit may begin at any time during a program cycle.
HARDWARE DATA PROTECTION:
Hardware features
protect against inadvertent programs to the
AT49LV1024/1025 in the following ways: (a) V
CC
sense: if
V
CC
is below 1.8V (typical), the program function is inhib-
ited. (b) Program inhibit: holding any one of OE low, CE
high or WE high inhibits program cycles. (c) Noise filter:
pulses of less than 15 ns (typical) on the WE or CE inputs
will not initiate a program cycle.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT49LV1025-70JC | 功能描述:IC FLASH 1MBIT 70NS 44PLCC 制造商:microchip technology 系列:- 包装:管件 零件状态:停產 存储器类型:非易失 存储器格式:闪存 技术:FLASH 存储容量:1Mb （64K x 16） 写周期时间 - 字，页:50μs 访问时间:70ns 存储器接口:并联 电压 - 电源:3 V ~ 3.6 V 工作温度:0°C ~ 70°C（TC） 安装类型:表面贴装 封装/外壳:44-LCC（J 形引线） 供应商器件封装:44-PLCC（16.59x16.59） 基本零件编号:AT49LV1025 标准包装:27 |
| AT49LV1025-70VC | 功能描述:IC FLASH 1MBIT 70NS 40VSOP 制造商:microchip technology 系列:- 包装:托盘 零件状态:停產 存储器类型:非易失 存储器格式:闪存 技术:FLASH 存储容量:1Mb （64K x 16） 写周期时间 - 字，页:50μs 访问时间:70ns 存储器接口:并联 电压 - 电源:3 V ~ 3.6 V 工作温度:0°C ~ 70°C（TC） 安装类型:表面贴装 封装/外壳:40-TFSOP（0.488"，12.40mm 宽） 供应商器件封装:40-VSOP 基本零件编号:AT49LV1025 标准包装:160 |
| AT49LV1025-90JC | 功能描述:IC FLASH 1MBIT 90NS 44PLCC RoHS:否 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:96 系列:- 格式 - 存储器:闪存 存储器类型:FLASH 存储容量:16M（2M x 8，1M x 16） 速度:70ns 接口:并联 电源电压:2.65 V ~ 3.6 V 工作温度:-40°C ~ 85°C 封装/外壳:48-TFSOP（0.724"，18.40mm 宽） 供应商设备封装:48-TSOP 包装:托盘 |
| AT49LV1025-90VC | 功能描述:IC FLASH 1MBIT 90NS 40VSOP 制造商:microchip technology 系列:- 包装:托盘 零件状态:停產 存储器类型:非易失 存储器格式:闪存 技术:FLASH 存储容量:1Mb （64K x 16） 写周期时间 - 字，页:50μs 访问时间:90ns 存储器接口:并联 电压 - 电源:3 V ~ 3.6 V 工作温度:0°C ~ 70°C（TC） 安装类型:表面贴装 封装/外壳:40-TFSOP（0.488"，12.40mm 宽） 供应商器件封装:40-VSOP 基本零件编号:AT49LV1025 标准包装:160 |
| AT49LV1614-90TC | 功能描述:闪存 16M bit 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 |
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