User's Manual

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S3C2450X RISC MICROPROCESSOR NAND FLASH CONTROLLER
7-3
5 GPC5/6/7 PIN CONFIGURATION TABLE IN IROM BOOT MODE
Page Address Cycle GPC7 [2] GPC6 [1] GPC5 [0]
MMC(MoviNAND/iNand) - - 0 0 0
Reserved - - 0 0 1
3 0 1 0
512
4 0 1 1
4 1 0 0
2048
5 1 0 1
Nand
4096 5 1 1 0
Above configuration is applicable when NAND Flash is used as booting memory in IROM boot mode. If NAND
Flash is not used as boot memory, the configuration can be changed by setting NFCON SFR ’NFCONF’
(0x4E000000). PageSize, PageSize_Ext and AddrCycle are fields in NFCONF(0x4E000000).
6 NAND FLASH MEMORY TIMING
HCLK
CLE / ALE
nWE
TACLS TWRPH0 TWRPH1
DATA
COMMAND / ADDRESS
Figure 7-3. CLE & ALE Timing (TACLS=1, TWRPH0=0, TWRPH1=0) Block Diagram