NH82801GBM SL8YB Intel Corporation, NH82801GBM SL8YB Datasheet - Page 765

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NH82801GBM SL8YB

Manufacturer Part Number
NH82801GBM SL8YB
Description
Manufacturer
Intel Corporation
Datasheet

Specifications of NH82801GBM SL8YB

Case
BGA
Date_code
07+
Serial Peripheral Interface (SPI) (Desktop and Mobile Only)
21
Serial Peripheral Interface
(SPI) (Desktop and Mobile
Only)
The Serial Peripheral Interface resides in memory mapped space. This function contains
registers that allow for the setup and programming of devices that reside on the SPI
interface.
Note:
All registers in this function (including memory-mapped registers) must be addressable
in Byte, Word, and DWord quantities. The software must always make register accesses
on natural boundaries (i.e., DWord accesses must be on DWord boundaries; word
accesses on word boundaries, etc.) In addition, the memory-mapped register space
must not be accessed with the LOCK semantic exclusive-access mechanism. If software
attempts exclusive-access mechanisms to the SPI memory-mapped space, the results
are undefined.
21.1
Serial Peripheral Interface Memory Mapped
Configuration Registers
The SPI Host Interface registers are memory-mapped in the RCRB Chipset Register
Space with a base address (SPIBAR) of 3020h and are located within the range of
3020h to 308Fh. The individual registers are then accessible at SPIBAR + Offset as
indicated in the following table.
These memory mapped registers must be accessed in byte, word, or DWord quantities.
Table 21-1. Serial Peripheral Interface (SPI) Register Address Map
(SPI Memory Mapped Configuration Registers) (Sheet 1 of 2)
SPIBAR +
Mnemonic
Offset
00h–01h
SPIS
02h–03h
SPIC
04h–07h
SPIA
08h–0Fh
SPID0
10h–17h
SPID1
18h–1Fh
SPID2
20h–27h
SPID3
28h–2Fh
SPID4
30h–37h
SPID5
38h–3Fh
SPID6
40h–47h
SPID7
®
Intel
ICH7 Family Datasheet
Register Name
SPI Status
SPI Control
SPI Address
SPI Data 0
SPI Data 1
SPI Data 2
SPI Data 3
SPI Data 4
SPI Data 5
SPI Data 6
SPI Data 7
Default
Access
See Register
RO, R/WC,
Description
R/WLO
0001h
R/W
00000000h
R/W
See Register
R/W
Description
00000000
R/W
00000000h
00000000
R/W
00000000h
00000000
R/W
00000000h
00000000
R/W
00000000h
00000000
R/W
00000000h
00000000
R/W
00000000h
00000000
R/W
00000000h
765

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