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PRELIMINARY
S3C6400X RISC MICROPROCESSOR
MEMORY SUBSYSTEM
4
-5
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.
Memory port 0 CS selection
Set static memory chip selection multiplexing of memory port 0.
Setting for MP0_CS_SEL[0] and MP0_CS_SEL[2] are ignored. Distinguishing OneNANDC and
NFCON is done by XSELNAND pin value instead of MP0_CS_SEL[0] and MP0_CS_SEL[2].
When XSELNAND is 0, OneNANDC is selected. When XSELNAND is 1, NFCON is selected.
When NAND booting (XOM[4:3] = 00) is selected, the setting values of MP0_CS_SEL[1] and
MP0_CS_SEL[3] setting are ignored. Xm0CSn[2] and Xm0CSn[3] are used as NFCON CS0
and NFCON CS1. In this case, XSELNAND must be set to 1.
When OneNAND booting (XOM[4:1] = 0110) is selected, the setting values of MP0_CS_SEL[1]
and MP0_CS_SEL[3] setting are ignored. Xm0CSn[2] and Xm0CSn[3] are used as OneNANDC
CS0 and OneNANDC CS1. In this case, XSELNAND must be set to 0.
MP0_CS_SEL
[5]
[4]
[3]
[2]
[1]
[0]
XSELNAND
Xm0CSn[0]
- - - - - -
x
SROMC
CS0
Xm0CSn[1]
- - - - - -
x
SROMC
CS1
- - - - 1 -
x
SROMC
CS2
- - - - 0 -
1
NFCON
CS0
Xm0CSn[2]
- - - - 0 -
0
OneNANDC
CS0
- - 1 - - -
x
SROMC
CS3
- - 0 - - -
1
NFCON
CS1
Xm0CSn[3]
- - 0 - - -
0
OneNANDC
CS1
- 0 - - - -
x
SROMC
CS4
Xm0CSn[4]
- 1 - - - -
x
CFCON
CS0
0 - - - - -
x
SROMC
CS5
Xm0CSn[5]
1 - - - - -
x
CFCON
CS1
Independent Port for CFCON selection
0= CFCON uses shared interface of EBI.
1= CFCON uses independent interface.
CKE init value (SPCONSLP[4](0x7F0088B0))
0 = Initialization values of Xm0CKE of memory port 0 and Xm1CKE of memory port 1 are zero
when reset comes.
1 = Initialization values of Xm0CKE of memory port 0 and Xm1CKE of memory port 1 are one
when reset comes.