參數(shù)資料
型號(hào)： HY27US16561M
廠商： Hynix Semiconductor Inc.
英文描述： 256Mbit (32Mx8bit / 16Mx16bit) NAND Flash
中文描述： 片256Mbit（32Mx8bit / 16Mx16bit）NAND閃存
文件頁(yè)數(shù)： 18/44頁(yè)
文件大?。?/td> 733K
代理商： HY27US16561M
Rev 0.7 / Oct. 2004
18
HY27SS(08/16)561M Series
HY27US(08/16)561M Series
256Mbit (32Mx8bit / 16Mx16bit) NAND Flash
Copy Back Program
The Copy Back Program operation is used to copy the data stored in one page and reprogram it in another page.
The Copy Back Program operation does not require external memory and so the operation is faster and more efficient
because the reading and loading cycles are not required. The operation is particularly useful when a portion of a block
is updated and the rest of the block needs to be copied to the newly assigned block.
If the Copy Back Program operation fails an error is signalled in the Status Register. However as the standard external
ECC cannot be used with the Copy Back operation bit error due to charge loss cannot be detected. For this reason it is
recommended to limit the number of Copy Back operations on the same data and or to improve the performance of
the ECC.
The Copy Back Program operation requires three steps:
- 1. The source page must be read using the Read A command (one bus write cycle to setup the command and then
3 bus cycles to input the source page address). This operation copies all 264 Words/ 528 Bytes from the page into the
Page Buffer.
- 2. When the device returns to the ready state (Ready/Busy High), the second bus write cycle of the command is
given with the 3 bus cycles to input the target page address. A24must be the same for the Source and Target Pages.
- 3. Then the confirm command is issued to start the P/E/R Controller.
After a Copy Back Program operation, a partial page program is not allowed in the target page until the block has been
erased.
See Figure 15 for an example of the Copy Back operation.
Block Erase
Erase operations are done one block at a time. An erase operation sets all of the bits in the addressed block to '1'. All
previous data in the block is lost. An erase operation consists of three steps (refer to Figure 17):
1. One bus cycle is required to setup the Block Erase command.
2. Only two bus cycles for 256Mb devices are required to input the block address. The first cycle (A0 to A7) is not
required as only addresses A14 to A24 (highest address depends on device density) are valid, A9 to A13 are ignored.
3. One bus cycle is required to issue the confirm command to start the P/E/R Controller.
Once the erase operation has completed the Status Register can be checked for errors.
Figure 15. Copy Back Operation
Source
Address Inputs
I/O
00h
Copy Back
Code
Target
Address Inputs
8Ah
10h
70h
Read
Code
Read Status Register
SR0
Busy
tBLBH2
(Program Busy time)
tBLBH1
(Read Busy time)
RB
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HY27US561M 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:256Mbit (32Mx8bit / 16Mx16bit) NAND Flash
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HY29DL162BF-12 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:16 Megabit (2M x 8/1M x16) Low Voltage, Dual Bank, Simultaneous Read/Write Flash Memory
HY29DL162BF-12I 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:16 Megabit (2M x 8/1M x16) Low Voltage, Dual Bank, Simultaneous Read/Write Flash Memory
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