Intel N2820 FH8065301616603 Data Sheet
Product codes
FH8065301616603
Serial ATA (SATA)
176
Datasheet
13.6.6
Secondary Descriptor Table Pointer (SDTP)—Offset Ch
Access Method
Default: 00000000h
13.6.7
AHCI Index Register (INDEX)—Offset 10h
This registers are only available if CC.SCC is not 01h to index into all memory registers
defined in Memory Registers and the message buffer used for enclosure management.
If CC.SCC is 01h, these AHCI Index Data Pair registers are not accessible and SINDEX/
SDATA register pair shall be used to index into a subset of the memory registers
defined in (See Memory Registers for more information on which registers could be
indexed).
Access Method
Default: 00000000h
Type: I/O Register
(Size: 32 bits)
SDTP: [LBAR] + Ch
LBAR Type: PCI Configuration Register (Size: 32 bits)
LBAR Reference: [B:0, D:19, F:0] + 20h
LBAR Reference: [B:0, D:19, F:0] + 20h
31
28
24
20
16
12
8
4
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
DB
A
RSV
D
0
Bit
Range
Default &
Access
Description
31:2
00000000h
RW
Descriptor Base Address (DBA): Corresponds to A[31:2]. This table must not cross a
64K boundary in memory. When read, the current value of the pointer is returned
1:0
0b
RO
RSVD0: Reserved
Type: I/O Register
(Size: 32 bits)
INDEX: [LBAR] + 10h
LBAR Type: PCI Configuration Register (Size: 32 bits)
LBAR Reference: [B:0, D:19, F:0] + 20h
LBAR Reference: [B:0, D:19, F:0] + 20h
31
28
24
20
16
12
8
4
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RSV
D
0
INDEX
RSV
D
1
Bit
Range
Default &
Access
Description
31:11
0b
RO
RSVD0: Reserved
10:2
000h
RO
Index (INDEX): This Index register is used to select the Dword offset of the Memory
Mapped AHCI register to be accessed. A Dword, Word or Byte access is specified by the
active byte enables of the I/O access to the Data register.
1:0
0b
RO
RSVD1: Reserved