Laptop User Manual

NAND FLASH CONTROLLER S3C2440A RISC MICROPROCESSOR
6-18
NFCON STATUS REGISTER
Register Address R/W Description Reset Value
NFSTAT 0x4E000020 R/W NAND Flash operation status register 0xXX00
NFSTAT Bit Description Initial State
Reserved [7]
Reserved
X
Reserved [4:6] Reserved 0
IllegalAccess [3]
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 [2]
When RnB low to high transition is occurred, this value set and
issue interrupt if enabled. To clear this value write ‘1’.
0: RnB transition is not detected
1: RnB transition is detected
Transition configuration is set in RnB_TransMode(NFCONT[8]).
0
nCE
(Read-only)
[1]
The status of nCE output pin
1
RnB
(Read-only)
[0]
The status of RnB input pin.
0: NAND Flash memory busy
1: NAND Flash memory ready to operate
1