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参数资料
| 型号： | AT49SV322A |
| 厂商： | Atmel Corp. |
| 英文描述： | 32-megabit (2M x 16/4M x 8) 1.8-volt Only Flash Memory |
| 中文描述： | 32兆位（2米x 16/4M × 8）1.8伏，只有闪存 |
| 文件页数： | 5/31页 |
| 文件大小： | 224K |
| 代理商： | AT49SV322A |
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5
AT49SV322A(T)
3360C–FLASH–3/04
Any commands written to the chip during the embedded programming cycle will be ignored. If
a hardware reset happens during programming, the data at the location being programmed
will be corrupted. Please note that a data “0” cannot be programmed back to a “1”; only erase
operations can convert “0”s to “1”s. Programming is completed after the specified t
BP
cycle
time. The Data Polling feature or the Toggle Bit feature may be used to indicate the end of a
program cycle. If the erase/program status bit is a “1”, the device was not able to verify that the
erase or program operation was performed successfully.
VPP PIN:
The circuitry of the AT49SV322A(T) is designed so that the device cannot be pro-
grammed or erased if the V
PP
voltage is less that 0.4V. When V
PP
is at 0.9V or above, normal
program and erase operations can be performed. The VPP pin cannot be left floating.
PROGRAM/ERASE STATUS:
The device provides several bits to determine the status of a
program or erase operation: I/O2, I/O3, I/O5, I/O6 and I/O7. The “Status Bit Table” on page 11
and the following four sections describe the function of these bits. To provide greater flexibility
for system designers, the AT49SV322A(T) contains a programmable configuration register.
The configuration register allows the user to specify the status bit operation. The configuration
register can be set to one of two different values, “00” or “01”. If the configuration register is set
to “00”, the part will automatically return to the read mode after a successful program or erase
operation. If the configuration register is set to a “01”, a Product ID Exit command must be
given after a successful program or erase operation before the part will return to the read
mode. It is important to note that whether the configuration register is set to a “00” or to a “01”,
any unsuccessful program or erase operation requires using the Product ID Exit command to
return the device to read mode. The default value (after power-up) for the configuration regis-
ter is “00”. Using the four-bus cycle Set Configuration Register command as shown in the
“Command Definition in Hex” table on page 12, the value of the configuration register can be
changed. Voltages applied to the RESET pin will not alter the value of the configuration regis-
ter. The value of the configuration register will affect the operation of the I/O7 status bit as
described below.
DATA POLLING:
The AT49SV322A(T) features Data Polling to indicate the end of a program
cycle. If the status configuration register is set to a “00”, during a program cycle an attempted
read of the last byte/word 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. During a chip or sector erase operation, an attempt to read the device will
give a “0” on I/O7. Once the program or erase cycle has completed, true data will be read from
the device. Data Polling may begin at any time during the program cycle. Please see “Status
Bit Table” on page 11 for more details.
If the status bit configuration register is set to a “01”, the I/O7 status bit will be low while the
device is actively programming or erasing data. I/O7 will go high when the device has com-
pleted a program or erase operation. Once I/O7 has gone high, status information on the other
pins can be checked.
The Data Polling status bit must be used in conjunction with the erase/program and V
PP
status
bit as shown in the algorithm in Figures 1 and 2 on page 9.
相关PDF资料 |
PDF描述 |
|---|---|
| AT49SV322AT | 32-megabit (2M x 16/4M x 8) 1.8-volt Only Flash Memory |
| AT49SV802A-90CI | 8-megabit 1.8-volt Only Flash Memory |
| AT49SV802A-90CU | 8-megabit 1.8-volt Only Flash Memory |
| AT49SV802A-90TI | 8-megabit 1.8-volt Only Flash Memory |
| AT49SV802A-90TU | 8-megabit 1.8-volt Only Flash Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT49SV322A-80CU | 制造商:Atmel Corporation 功能描述:Flash Parallel 1.8V 32Mbit 4M/2M x 8bit/16bit 80ns 48-Pin CBGA |
| AT49SV322D-80CU | 功能描述:闪存 32M 1.8V 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 |
| AT49SV322D-80TU | 功能描述:闪存 32M 1.8V 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 |
| AT49SV322DT-80CU | 功能描述:闪存 32M 1.8V 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 |
| AT49SV322DT-80TU | 功能描述:闪存 32M 1.8V 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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