In a given DIMM configuration, the logic chip select is mapped to physical slot using an 8-bit number per SLOT. Each bit corresponds to a logic chip select connectivity in a SLOT.
Example 1: Dual-Rank DIMM, Dual Slot system (total of four ranks):
SLOT0_CONFIG = 8'b0000_0011 // describes CS0 and CS1 are connected to SLOT0.
SLOT1_CONFIG = 8'b0000_1100 // describes CS2 and CS3 are connected to SLOT1.
SLOT0_FUNC_CS = 8'b0000_0011 // describes CS0 and CS1 in SLOT0 are functional chip select.
SLOT1_FUNC_CS = 8'b0000_1100 // describes CS2 and CS3 in SLOT1 are functional chip select.
SLOT0_ODD_CS = 8'b0000_0010 // describes CS1 bit corresponding to ODD functional chip select located in slot0.
SLOT1_ODD_CS = 8'b0000_1000 // describes CS3 bit corresponding to ODD functional chip select located in slot1. Example 2: Single-Rank DIMM, Dual Slot system (total of two ranks):
SLOT0_CONFIG = 8'b0000_0001 // describes CS0 is connected to SLOT0.
SLOT1_CONFIG = 8'b0000_0010 // describes CS1 is connected to SLOT1.
SLOT0_FUNC_CS = 8'b0000_0001 // describes CS0 in SLOT0 is functional chip select.
SLOT1_FUNC_CS = 8'b0000_0010 // describes CS1 in SLOT1 is functional chip select.
SLOT0_ODD_CS = 8'b0000_0000 // describes there is no ODD functional chip select located in slot0.
SLOT1_ODD_CS = 8'b0000_0000 // describes there is no ODD functional chip select located in slot1.