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PRELIMINARY
NAND FLASH CONTROLLER
S3C6400X RISC MICROPROCESSOR
8-2
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.
BLOCK DIAGRAM
SFR
ECC Gen.
Stepping Stone
(4KB SRAM)
Stepping Stone
Controller
SY
STE
M
BUS
NAND FLASH
Interface
CLE
ALE
nFCE
nRE
nWE
R/nB
I/O0 - I/O7
AHB
Slave I/F
Control &
State Machine
Figure 8-1 NAND Flash Controller Block Diagram
BOOT LOADER FUNCTION
Stepping Stone
(4KB Buffer)
NAND FLASH
Controller
NAND FLASH
Memory
Special Function
Registers
REGISTERS
AUTO BOOT
CORE ACCESS
(Boot Code)
USER ACCESS
Figure 8-2 NAND Flash Controller Boot Loader Block Diagram
During reset, the NAND flash controller will get information about connected NAND flash through Pin status of
XOM (refer to
PIN CONFIGURATION
). After power-on or system reset is occurred, the NAND Flash controller
loads automatically the 4-KB boot loader codes. After loading the boot loader codes, the boot loader code in
steppingstone is executed.
NOTE
: During the auto boot, the ECC is not checked. Therefore, the first 4-KB of NAND flash must not have bit
error.