12 partition information (pi) block (slc only), Flex-muxonenand4g(kfm4gh6q4m-debx) – Samsung FLEX-MUXONENAND KFN8GH6Q4M User Manual
Page 85
Flex-MuxOneNAND4G(KFM4GH6Q4M-DEBx)
- 85 -
FLASH MEMORY
Flex-MuxOneNAND8G(KFN8GH6Q4M-DEBx)
Flex-MuxOneNAND16G(KFKAGH6Q4M-DEBx)
3.12 Partition Information (PI) Block (SLC Only)
One Block of the SLC NAND Flash Array memory is reserved for Partition Information (PI) Block.
The block can be read, programmed and erased using the same operations as any other NAND Flash Array memory block.
Only Load, Erase and Program can be performed. PI Block is not able to cover with internal ECC Engine in OneNAND, so it has to be
accessed under ECC off mode.
PI block is guaranteed to be a valid block up to 1K program/erase cycles.
Entering the PI Block
The PI block is separately accessible from the rest of the NAND Flash Array by using the PI Access command instead of the Flash Block
Address (FBA).
Exiting the PI Block
To exit the PI Access Mode, a Cold-, Warm-, Hot-, or NAND Flash Core Reset operation is performed.
Exiting the PI Block during an Erase Operation
If the Reset-triggered exit from the PI Access Mode happens after during an Erase Suspend Operation, the erase routine could fail. Therefore
to exit from the PI Access Mode without causing the erase operation to fail, a 'NAND Flash Core Reset' command should be issued.
PI Block Page Allocation Information
This is located at the 1st word of sector0 of page0 of main area in the Block.
The allocated word in 1st page is programed with data FC00h initially after shipment, whole block is set as MLC except Block 0.
PI Lock bits and Boundary Address.
PI Block can be locked only by programming lock bits into [15:14] of the 1st word of sector0, page0 of the main memory area of PI.
The first block is a SLC block. The MLC block will be defined from the next block of the block designated by boundary address programmed
into[9:0] of the 1st word of sector0, page0 of the main memory area of PI.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Lock
Reserved(1111)
Boundary Address (end of SLC area)
Block0
BlockN
BlockN+1
Block1023
Boundary
Address
SLC area (Default)
SLC area
MLC area
[NAND Flash Array]