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Preliminary
NAND FLASH CONTROLLER
S3C2451X RISC MICROPROCESSOR
7-16
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
NFCONT
Bit
Description
Initial State
EnbIllegalAccINT [10]
Illegal access interrupt control
0: Disable interrupt
1: Enable interrupt
Illegal access interrupt will occurs when CPU tries to
program or erase locking area (the area setting in NFSBLK
(0x4E000020) to NFEBLK (0x4E000024)).
0
EnbRnBINT
[9]
RnB status input signal transition interrupt control
0: Disable RnB interrupt 1: Enable RnB interrupt
0
RnB_TransMode
[8]
RnB transition detection configuration
0: Detect rising edge
1: Detect falling edge
0
MainECCLock
[7]
Lock Main area ECC generation
0: Unlock Main area ECC
1: Lock Main area ECC
Main area ECC status register is
NFMECC0/1(0x4E000034/38),
1
SpareECCLock
[6]
Lock Spare area ECC generation.
0: Unlock Spare ECC
1: Lock Spare ECC
Spare area ECC status register is NFSECC(0x4E00003C),
1
InitMECC
[5]
1: Initialize main area ECC decoder/encoder (write-only)
0
InitSECC
[4]
1: Initialize spare area ECC decoder/encoder (write-only)
0
Reserved [3]
Reserved
0
Reg_nCE1
[2]
NAND Flash Memory nRCS[1] signal control
0: Force nRCS[1] to low(Enable chip select)
1: Force nRCS[1] to High(Disable chip select)
Note
: Even Reg_nCE1 and Reg_nCE0 are set to zero
simultaneously, only one of them is asserted.
1
Reg_nCE0
[1]
NAND Flash Memory nFCE signal control
0: Force nFCE to low(Enable chip select)
1: Force nFCE to High(Disable chip select)
Note
: During boot time, it is controlled automatically.
This value is only valid while MODE bit is 1
1
MODE
[0]
NAND Flash controller operating mode
0: NAND Flash Controller Disable (Don’t work)
1: NAND Flash Controller Enable
0