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参数资料
| 型号： | AT45DB642-TC |
| 厂商： | Atmel |
| 文件页数： | 9/37页 |
| 文件大小： | 0K |
| 描述： | IC FLASH 64MBIT 20MHZ 40TSOP |
| 标准包装： | 120 |
| 格式 - 存储器： | 闪存 |
| 存储器类型： | DataFLASH |
| 存储容量： | 64M（8192 页 x 1056 字节） |
| 速度： | 20MHz 串行/5MHz 并行 |
| 接口： | 并行/串行 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 40-TFSOP（0.724"，18.40mm 宽） |
| 供应商设备封装： | 40-TSOP |
| 包装： | 托盘 |
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AT45DB642
MAIN MEMORY PAGE TO BUFFER COMPARE: A page of data in main memory can be
compared to the data in buffer 1 or buffer 2. To initiate the operation, a 1-byte opcode, 60H for
buffer 1 and 61H for buffer 2, must be clocked into the device, followed by three address bytes
consisting of 13 page address bits (PA12 - PA0) that specify the page in the main memory that
is to be compared to the buffer, and 11 don ’ t care bits. The CS pin must be low while toggling
the SCK/CLK pin to load the opcode and the address bytes from the input pins (SI or I/O7 -
I/O0). On the low-to-high transition of the CS pin, the 1056 bytes in the selected main memory
page will be compared with the 1056 bytes in buffer 1 or buffer 2. During this time (t XFR ), the
status register and the RDY/BUSY pin will indicate that the part is busy. On completion of the
compare operation, bit 6 of the status register is updated with the result of the compare.
AUTO PAGE REWRITE: This mode is only needed if multiple bytes within a page or multiple
pages of data are modified in a random fashion. This mode is a combination of two operations:
Main Memory Page to Buffer Transfer and Buffer to Main Memory Page Program with Built-in
Erase. A page of data is first transferred from the main memory to buffer 1 or buffer 2, and
then the same data (from buffer 1 or buffer 2) is programmed back into its original page of
main memory. To start the rewrite operation, a 1-byte opcode, 58H for buffer 1 or 59H for
buffer 2, must be clocked into the device, followed by three address bytes comprised of 13
page address bits (PA12 - PA0) that specify the page in main memory to be rewritten and 11
don ’ t care bits. When a low-to-high transition occurs on the CS pin, the part will first transfer
data from the page in main memory to a buffer and then program the data from the buffer back
into same page of main memory. The operation is internally self-timed and should take place
in a maximum time of t EP . During this time, the status register and the RDY/BUSY pin will indi-
cate that the part is busy.
If a sector is programmed or reprogrammed sequentially page by page, then the programming
algorithm shown in Figure 1 (page 33) is recommended. Otherwise, if multiple bytes in a page
or several pages are programmed randomly in a sector, then the programming algorithm
shown in Figure 2 (page 34) is recommended. Each page within a sector must be
updated/rewritten at least once within every 10,000 cumulative page erase/program opera-
tions in that sector.
Operation Mode
Summary
The modes described can be separated into two groups – modes that make use of the Flash
memory array (Group A) and modes that do not make use of the Flash memory array
(Group B).
Group A modes consist of:
1. Main Memory Page to Buffer 1 (or 2) Transfer
2. Main Memory Page to Buffer 1 (or 2) Compare
3. Buffer 1 (or 2) to Main Memory Page Program with Built-in Erase
4. Buffer 1 (or 2) to Main Memory Page Program without Built-in Erase
5. Page Erase
6. Block Erase
7. Main Memory Page Program through Buffer
8. Auto Page Rewrite
9. Group B modes consist of:
10. Buffer 1 (or 2) Read
11. Buffer 1 (or 2) Write
12. 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.
9
1638F – DFLSH – 09/02
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| AT45DB642-TI | 功能描述:闪存 64M 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 |
| AT45DB64D2-CNU | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:32-bit Microcontrollers |
| AT45DCB002 | 功能描述:存储卡 2M bit RoHS:否 制造商:Olimex Ltd. 产品:SD 存储容量: 连续读取: 连续写入: 有源模式电流: 工作电源电压: 最大工作温度: 尺寸: |
| AT45DCB002D | 功能描述:存储卡 CARD 2M BYTE RoHS:否 制造商:Olimex Ltd. 产品:SD 存储容量: 连续读取: 连续写入: 有源模式电流: 工作电源电压: 最大工作温度: 尺寸: |
| AT45DCB004 | 功能描述:DATAFLASH CARD 4MEGABYTE RoHS:否 类别:存储卡，模块 >> 存储器，PC 卡 系列:- 标准包装:30 系列:- 存储容量:8GB 存储器类型:存储卡 - Extreme III SD? |
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