HY27US08281A-TPCB Hynix, HY27US08281A-TPCB Datasheet - Page 12

• Manufacturer Part Number: HY27US08281A-TPCB
• Description: Flash Mem Parallel 3.3V 128M-Bit 16M x 8 10us 48-Pin TSOP-I
• Manufacturer: Hynix

Specifications of HY27US08281A-TPCB

• Package: 48TSOP-I
• Cell Type: NAND
• Density: 128 Mb
• Architecture: Sectored
• Block Organization: Symmetrical
• Typical Operating Supply Voltage: 3.3 V
• Sector Size: 16KByte x 1024
• Support Of Page Mode: Yes
• Timing Type: Asynchronous
• Operating Temperature: 0 to 70 °C
• Interface Type: Parallel

3.3 Block Erase.
The Erase operation is done on a block (16K Byte) basis. It consists of an Erase Setup command (60h), a Block
address loading and an Erase Confirm Command (D0h). The Erase Confirm command (D0h) following the block
address loading initiates the internal erasing process. This two-step sequence of setup followed by execution com-
mand ensures that memory contents are not accidentally erased due to external noise conditions.
The block address loading is accomplished in two to three cycles depending on the device density. Only block
addresses (A14 to A23) are needed while A9 to A13 is ignored.
At the rising edge of WE# after the erase confirm command input, the internal Program Erase Controller handles erase
and erase-verify. When the erase operation is completed, the Write Status Bit (I/O 0) may be checked. Figure_16
details the sequence.
3.4 Copy-Back Program.
The copy-back program is provided to quickly and efficiently rewrite data stored in one page within the plane to
another page within the same plane without using an external memory. Since the time-consuming sequential-reading
and its reloading cycles are removed, the system performance is improved. The benefit is especially obvious when a
portion of a block is updated and the rest of the block also need to be copied to the newly assigned free block. The
operation for performing a copy-back program is a sequential execution of page-read without burst-reading cycle and
copying-program with the address of destination page. A normal read operation with "00h" command and the address
of the source page moves the whole 528byte data into the internal buffer. As soon as the device returns to Ready
state, Page-Copy Data-input command (8Ah) with the address cycles of destination page followed may be written. The
Program Confirm command (10h) is not needed to actually begin the programming operation. For backward-compati-
bility, issuing Program Confirm command during copy-back does not affect correct device operation.
Copy-Back Program operation is allowed only within the same memory plane. Once the Copy-Back Program is finished,
any additional partial page programming into the copied pages is prohibited before erase. Plane address must be the
same between source and target page
"When there is a program-failure at Copy-Back operation, error is reported by pass/fail status. But, if
Copy-Back operations are accumulated over time, bit error due to charge loss is not checked by external
error detection/correction scheme. For this reason, two bit error correction is recommended for the use
of Copy-Back operation."
Figure 15 shows the command sequence for the copy-back operation.
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
- 2. When the device reutrns to the ready state (Ready/Busy High), the second bus write cycle of the command is
- 3. Then the confirm command is issued to start the P/E/R Controller.
Rev 0.6 / Nov. 2005
bus cycles to input the cource page address.) This operation copies all 264 Words/ 528 Bytes from the page into
the page Buffer.
given with the 3cycles to input the target page address. A23 must be the same for the Source and Target
Pages.
128Mbit (16Mx8bit / 8Mx16bit) NAND Flash
HY27US(08/16)281A Series
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