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参数资料
| 型号： | AT45DB021B-TU |
| 厂商： | ATMEL CORP |
| 元件分类： | DRAM |
| 英文描述： | 2-megabit 2.7-volt Only DataFlash |
| 中文描述： | 2M X 1 FLASH 2.7V PROM, PDSO28 |
| 封装： | 18 X 13.40 MM, GREEN, PLASTIC, MO-183, TSOP1-28 |
| 文件页数： | 9/32页 |
| 文件大小： | 304K |
| 代理商： | AT45DB021B-TU |
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9
1937J–DFLSH–9/05
AT45DB021B
5.4
Operation Mode Summary
The modes described can be separated into two groups – modes which make use of the Flash
memory array (Group A) and modes which do not make use of the Flash memory array (Group
B).
Group A modes consist of:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Main Memory Page Read
Main Memory Page to Buffer 1 (or 2) Transfer
Main Memory Page to Buffer 1 (or 2) Compare
Buffer 1 (or 2) to Main Memory Page Program with Built-in Erase
Buffer 1 (or 2) to Main Memory Page Program without Built-in Erase
Page Erase
Block Erase
Main Memory Page Program through Buffer
Auto Page Rewrite
Group B modes consist of:
1.
2.
3.
Buffer 1 (or 2) Read
Buffer 1 (or 2) Write
Status Register Read
If a Group A mode is in progress (not fully completed), then another mode in Group A should not
be started. However, during this time in which a Group A mode is in progress, modes in Group B
can be started.
This gives the Serial DataFlash the ability to virtually accommodate a continuous data stream.
While data is being programmed into main memory from buffer 1, data can be loaded into buffer
2 (or vice versa). See application note AN-4 (“Using Atmel’s Serial DataFlash”) for more details.
Table 5-3.
Read Commands
Command
SCK Mode
Opcode
Continuous Array Read
Inactive Clock Polarity Low or High
68H
SPI Mode 0 or 3
E8H
Main Memory Page Read
Inactive Clock Polarity Low or High
52H
SPI Mode 0 or 3
D2H
Buffer 1 Read
Inactive Clock Polarity Low or High
54H
SPI Mode 0 or 3
D4H
Buffer 2 Read
Inactive Clock Polarity Low or High
56H
SPI Mode 0 or 3
D6H
Status Register Read
Inactive Clock Polarity Low or High
57H
SPI Mode 0 or 3
D7H
相关PDF资料 |
PDF描述 |
|---|---|
| AT45DB021B-SC | 2-megabit 2.7-volt Only DataFlash?? |
| AT45DB021B-CC | 2-megabit 2.7-volt Only DataFlash?? |
| AT45DB021B-CI | 2-megabit 2.7-volt Only DataFlash?? |
| AT45DB021B-RC | 2-megabit 2.7-volt Only DataFlash?? |
| AT45DB021B-RI | 2-megabit 2.7-volt Only DataFlash?? |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT45DB021D | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:2-megabit 2.7-volt DataFlash |
| AT45DB021D_07 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:2-megabit 2.7-volt DataFlash |
| AT45DB021D_08 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:2-megabit 2.7-volt Minimum DataFlash |
| AT45DB021D_09 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:2-megabit 2.7-volt Minimum DataFlash |
| AT45DB021D-MH-SL954 | 制造商:Adesto Technologies Corporation 功能描述:8-UDFN (5X6), IND TEMP, 2.7V, TRAY, 256 BYTE PAGE - Trays |
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