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PRELIMINARY
NAND FLASH CONTROLLER
S3C6400X RISC MICROPROCESSOR
8-22
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.
NFCON STATUS REGISTER
Register
Address
R/W
Description
Reset Value
NFSTAT
0x70200028 R/W NAND Flash operation status register
0x0080001D
NFSTAT
Bit
Description
Initial State
Reserved [31:24]
Read undefined
0x00
BootDone [23]
When NAND Flash is set as booting device, it indicates whether
loading boot area to Stepping stone is finished or not.
1
Reserved [22:7]
Reserved
0x00
ECCDecDone
[6]
When 4-bit ECC decoding is finished, this value set and issue
interrupt if enabled. The NFMLCBITPT, NFMLCL0 and
NFMLCEL1 have valid values., .To clear this write to ‘1’
1: 4-bit ECC decoding is completed
0
IllegalAccess [5]
Once Soft Lock or Lock-tight is enabled, The illegal access
(program, erase) to the memory makes this bit set.
0: illegal access is not detected
1: illegal access is detected
0
RnB_TransDetect [4] When RnB low to high transition is occurred, this value set and
issue interrupt if enabled. To clear this write ‘1’.
0: RnB transition is not detected
1: RnB transition is detected
Transition configuration is set in RnB_TransMode(NFCONT[8]).
1
NCE[1]
(Read-only)
[3]
The status of nCE[1] output pin
1
NCE[0]
(Read-only)
[2]
The status of nCE[0] output pin
1
Reserved [1]
Reserved
0
RnB
(Read-only)
[0]
The status of RnB input pin.
0: NAND Flash memory busy
1: NAND Flash memory ready to operate
1