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参数资料
| 型号： | AT26DF321-SU |
| 厂商： | Atmel |
| 文件页数： | 21/34页 |
| 文件大小： | 0K |
| 描述： | IC FLASH 32MBIT 66MHZ 8SOIC |
| 标准包装： | 95 |
| 格式 - 存储器： | 闪存 |
| 存储器类型： | DataFLASH |
| 存储容量： | 32M（16384 页 x 256 字节） |
| 速度： | 66MHz |
| 接口： | SPI 3 线串行 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
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AT26DF321
? Write Disable operation completes successfully
? Write Status Register operation completes successfully or aborts
? Protect Sector operation completes successfully or aborts
? Unprotect Sector operation completes successfully or aborts
? Byte/Page Program operation completes successfully or aborts
? Block Erase operation completes successfully or aborts
? Chip Erase operation completes successfully or aborts
If the WEL bit is in the logical “1” state, it will not be reset to a logical “0” if an operation aborts
due to an incomplete or unrecognized opcode being clocked into the device before the CS pin is
deasserted. In order for the WEL bit to be reset when an operation aborts prematurely, the entire
opcode for a program, erase, Protect Sector, Unprotect Sector, or Write Status Register com-
mand must have been clocked into the device.
10.1.6
RDY/BSY Bit
The RDY/BSY bit is used to determine whether or not an internal operation, such as a program
or erase, is in progress. To poll the RDY/BSY bit to detect the completion of a program or erase
cycle, new Status Register data must be continually clocked out of the device until the state of
the RDY/BSY bit changes from a logical “1” to a logical “0”.
Figure 10-1. Read Status Register
CS
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
SCK
OPCODE
SI
0
0
0
0
0
1
0
1
MSB
STATUS REGISTER DATA
STATUS REGISTER DATA
SO
HIGH-IMPEDANCE
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
10.2
Write Status Register
MSB
MSB
MSB
The Write Status Register command is used to modify the SPRL bit of the Status Register
and/or to perform a Global Protect or Global Unprotect operation. Before the Write Status Regis-
ter command can be issued, the Write Enable command must have been previously issued to
set the WEL bit in the Status Register to a logical “1”.
To issue the Write Status Register command, the CS pin must first be asserted and the opcode
of 01h must be clocked into the device followed by one byte of data. The one byte of data con-
sists of the SPRL bit value, a don't care bit, four data bits to denote whether a Global Protect or
Unprotect should be performed, and two additional don’t care bits (see Table 10-2 ). Any addi-
tional data bytes that are sent to the device will be ignored. When the CS pin is deasserted, the
SPRL bit in the Status Register will be modified and the WEL bit in the Status Register will be
reset back to a logical “0”. The values of bits 5, 4, 3, and 2 and the state of the SPRL bit before
the Write Status Register command was executed (the prior state of the SPRL bit) will determine
whether or not a Global Protect or Global Unprotect will be perfomed. Please refer to the “Global
Protect/Unprotect” section on page 14 for more details.
21
3633F–DFLASH–5/7/08
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT26DF321-SU SL514 | 制造商:Atmel Corporation 功能描述: |
| AT26F004 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:4-megabit 2.7-volt Only Serial Firmware DataFlash Memory |
| AT26F004_06 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:4-megabit 2.7-volt Only Serial Firmware DataFlash Memory |
| AT26F004_08 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:4-megabit 2.7-volt Only Serial Firmware DataFlash Memory |
| AT26F004-MU | 功能描述:闪存 4M SERIAL FLASH IND TEMP 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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