Intel PCH-LP, Programming Manual

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Descriptor Overview
4.1.2.2 FLILL—Flash Invalid Instructions Register
(Flash Descriptor Records)
Memory Address: FCBA + 004h Size: 32 bits
4.1.2.3 FLILL1—Flash Invalid Instructions Register
(Flash Descriptor Records)
Memory Address: FCBA + 008h Size: 32 bits
16:8
Reserved
7:4
Component 1 Density. (C1DEN) This field identifies the size of the 2nd Flash component
connected directly to the PCH. If there is not 2nd Flash component, the contents of this field should
be read as “1111b”
0000 = 512 KB
0001 = 1 MB
0010 = 2 MB
0011 = 4 MB
0100 = 8 MB
0101 = 16 MB
0110 = 32 MB
0111 = 64 MB
1000 - 1110 = Reserved
1111 = 2nd flash component not present
Note: This field is defaulted to “1111b” after reset
Note: C1DEN field will be ignored if FLMAP0.NC bit [9:8] is set to 00 i.e. 1 component only.
3:0
Component 0 Density (C0DEN). This field identifies the size of the 1st or only Flash component
connected directly to the PCH.
0000 = 512 KB
0001 = 1 MB
0010 = 2 MB
0011 = 4 MB
0100 = 8 MB
0101 = 16 MB
0110 = 32 MB
0111 = 64 MB
1000 - 1111 = Reserved
Note: This field is defaulted to “0101b” (16MB_) after reset.
Bits Description
Bits Description
31:24 Invalid Instruction 3. See definition of Invalid Instruction 0
23:16 Invalid Instruction 2. See definition of Invalid Instruction 0
15:8 Invalid Instruction 1. See definition of Invalid Instruction 0
7:0
Invalid Instruction 0.
Opcode for an instruction that the Flash Controller should protect against, such as Chip Erase. This
byte should be set to 0 if there are no invalid instructions to protect against for this field. Opcodes
programmed in the Software Sequencing Opcode Menu Configuration and Prefix-Opcode
Configuration are not allowed to use any of the Invalid Instructions listed in this register.
Bits Description
31:24 Invalid Instruction 7. See definition of Invalid Instruction 0
23:16 Invalid Instruction 6. See definition of Invalid Instruction 0
15:8 Invalid Instruction 5. See definition of Invalid Instruction 0
7:0 Invalid Instruction 4. See definition of Invalid Instruction 0