Nand Flash Configuration Register - Samsung S3C2416 User Manual

S3C2416 RISC MICROPROCESSOR

13.2 NAND FLASH CONFIGURATION REGISTER

Register Address
NFCONF 0x4E000000
NFCONF
Reserved [31]
Reserved [30]
Reserved [29:26]
MsgLength [25]
ECCType [24:23]
Reserved [22:15]
TACLS [14:12]
Reserved [11]
TWRPH0 [10:8]
Reserved
TWRPH1 [6:4]
PageSize
PageSize_Ext
R/W
R/W NAND Flash Configuration register
Bit
Reserved
Should be 0
Reserved
Message (Data) length for 4/8 bit ECC
0 = 512-byte
1 = 24-byte
This bit indicates what kind of ECC should be used.
00 = 1-bit ECC
10 = 4-bit ECC
01 = 8-bit ECC
Note: Don't confuse the value of 4-bit ECC and 8-bit ECC.
Reserved
CLE & ALE duration setting value (0~7)
Duration = HCLK x TACLS
Reserved
TWRPH0 duration setting value (0~7)
Duration = HCLK x ( TWRPH0 + 1 )
[7] Reserved
TWRPH1 duration setting value (0~7)
Duration = HCLK x ( TWRPH1 + 1 )
[3] This bit indicates the page size of NAND Flash Memory
When PageSize_Ext is 1, the value of PageSize means
following:
0 = 512 Bytes/page,
When PageSize_Ext is 0, the value of PageSize means
following:
0 = 2048 Bytes/page, 1 = 4096 Bytes/page
[2] This bit indicated what kind of NAND Flash memory is used.
0 = Large Size NAND Flash
1 = Small Size NAND Flash
This bit is determined by OM[2] pin status on reset and wake-
up time from sleep mode.
This bit can be changed by software later.
Description
Description
1 = 2048 Bytes/page
NAND FLASH CONTROLLER
Reset Value
0xX000100X
Initial State
0
0
0000
0
H/W Set
(CfgBootEcc)
000000000
001
0
000
0
000
H/W Set
(CfgAdvFlash)
1
7-13