W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 56

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

DRAM Control Register (DRAMCTRL)
Port address: 0x00000038
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bits 9-11
W90221X version 0.6
DISAF
Banks
0
8
1
0
1
0
1
Type
1
9
MCLK Control Select
Number of banks in DIMM
DRAM type
SDRAM
SDRAM configuration
DIMM
Onboard
SDRAM reset end select
Reserved for simulation only.
SDRAM precharge set
Setting this bit will issue a precharge command to SDRAM.
SDRAM mode register set
Setting this bit will issue a load mode register command to SDRAM.
SDRAM refresh cycle enable
Setting this bit will issue a refresh command to SDRAM.
SDRAM clock enable
Disable
Enable
Swap out 0xA0000 ~ 0xFFFFF
When this bit is set to logic 1, address space 0xA0000 ~ 0xFFFFF will
not be recognized as system DRAM space.
DRAM controller control signal clock skew adjustment
Onboard TESTREF Precharge
10
2
Access type: read/write
11
3
12
4
MCLK Data Select
MRS
13
5
Refresh
14
6
Default: 0x0
CKE
15
7
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