NH82801HEM S LA5R Intel, NH82801HEM S LA5R Datasheet - Page 765
NH82801HEM S LA5R
Manufacturer Part Number
NH82801HEM S LA5R
Description
Manufacturer
Intel
Datasheet
1.NH82801HEM_S_LA5R.pdf
(890 pages)
Specifications of NH82801HEM S LA5R
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Serial Peripheral Interface (SPI)
20.2.2
20.2.2.1
Intel
®
ICH8 Family Datasheet
Flash Descriptor Component Section
The following section of the Flash Descriptor is used to identify the different Flash
Components and their capabilities.
FLCOMP—Flash Components Register
(Flash Descriptor Memory Mapped Configuration Registers)
Memory Address:FCBA + 000h
31:30
29:27
26:24
23:21
20
19:17
Bits
Reserved
Read ID and Read Status Clock Frequency:
000 = 20 MHz
001 = 33 MHz
All other Settings: Reserved
NOTE: If more than one Flash component exists, this field must be set to the lowest
Write and Erase Clock Frequency:
000 = 20 MHz
001 = 33 MHz
All other Settings: Reserved
NOTE: If more than one Flash component exists, this field must be set to the lowest
Fast Read Clock Frequency: This field identifies the frequency that can be used with
the Fast Read instruction. This field is undefined if the Fast Read Support field is 0.
000 = 20 MHz
001 = 33 MHz
All other Settings = Reserved
NOTE: If more than one Flash component exists, this field must be set to the lowest
Fast Read Support:
0 = Fast Read is not Supported
1 =Fast Read is supported
If the Fast Read Support bit is a '1' and a device issues a Direct Read or issues a read
command from the Hardware Sequencer and the length is greater than 4 bytes, then
the SPI Flash instruction should be "Fast Read". If the Fast Read Support is a '0' or the
length is 1-4 bytes, then the SPI Flash instruction should be "Read".
Reads to the Flash Descriptor always use the Read command independent of the setting
of this bit.
NOTE: If more than one Flash component exists, this field can only be set to '1' if both
Read Clock Frequency:
000 = 20 MHz
All other Settings = Reserved
NOTE: If more than one Flash component exists, this field must be set to the lowest
common frequency of the different Flash components.
common frequency of the different Flash components.
common frequency of the different Flash components.
components support Fast Read.
common frequency of the different Flash components.
Description
Size:
32 bits
765
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