Me Vscc) Table; How To Set A Jedec Id Portion Of Intel ® Me Vscc Table Entry; Intel; How To Set A Vscc Entry In - Intel PCH-LP Programming Manual

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4.4

Intel

(Intel
The Intel
installed SPI flash if there is no SFDP table found. This table is defined in the descriptor
and is the responsibility of who puts together the NVM image. VSCCn registers are
defined in memory space and must be set by BIOS. This table must define every flash
part that is intended to be used. The size (number of max entries) of the table is
defined in
entry is made of two parts: the JEDEC ID and VSCC setting.
4.4.1 How to Set a JEDEC ID Portion of Intel
Entry
8.3.2 Device ID
7 .4.1 Adding a New Table Entry
3 2 7 H
Table 4-4. Jidn - JEDEC ID Portion of Intel
Bits
31:24
23:16
15:8
7:0
If using Flash Image Tool (FIT) refer to System Tools user guide in the Intel
and the respective FW Bring up Guide on how to build the image. If not, refer to
FLUMAP1—Flash Upper Map 1 (Flash Descriptor Records)
Specific Component Capabilities n (Flash Descriptor
4.4.2

How to Set a VSCC Entry in

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Intel
VSCC0 needs to be programmed in instances where there is only SPI component in the
system. When using an asymmetric flash component (part with two different sets of
attributes based on address) VCSCC0 and VSCC1 will need to be used. This includes if
the system is intended to support both symmetric AND asymmetric SPI flash parts.
Refer to 4 .4.3 Intel
3 3 7 H
See text below the table for explanation on how to determine Intel Management Engine
VSCC value.
38
ME Vendor-Specific Component Capabilities
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ME VSCC) Table

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ME VSCC Table defines how the Intel® ME will communicate with the
4.1.6.1 FLUMAP1—Flash Upper Map 1 (Flash Descriptor
shows how to obtain the 3 byte JEDEC ID for the target SPI flash.
Reserved.
SPI Component Device ID 1: This identifies the second byte of the Device ID of the SPI Flash
Component. This is the third byte returned by the Read JEDEC-ID command (opcode 9Fh).
SPI Component Device ID 0: This identifies the first byte of the Device ID of the SPI Flash
Component. This is the second byte returned by the Read JEDEC-ID command (opcode 9Fh).
SPI Component Vendor ID: This identifies the one byte Vendor ID of the SPI Flash Component.
This is the first byte returned by the Read JEDEC-ID command (opcode 9Fh).
ME VSCC Table for Broadwell PCH-LP Platforms
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ME VSCC Table Settings for Broadwell PCH-LP Family
Intel Confidential
Shows how to set this value in FITC.
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ME VSCC Table
Description
Records).
Descriptor Overview
Records). Each Table
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ME VSCC Table
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ME FW kit
4.1.6.1
thru 4.1.7.4 VSCCn—Vendor
Systems.
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