Nibble utilization for a 72-bit, Single Rank
UDIMM/SODIMM interface with ECC in the non-flipped configuration is shown in the
following figure. DQ indicates a data nibble, AC indicates an Address/Command/Control
nibble,
sys_clk indicates a nibble comprising the
System Clock pair, RESET_n, and ALERT_n. Note that for a 64-bit, Single Rank
UDIMM/SODIMM interface without ECC, nibbles 4 and 5 in addition to nibbles 6, 7, and 8
in the third Bank would be free.Important: The nibble utilization figure is based on the
fixed pinout output by Vivado for this
configuration.
Figure 1. Nibble Utilization for 72-bit Single Rank UDIMM/SODIMM with ECC
(Non-flipped)
Nibble utilization for a 72-bit, Multi-rank (Single Slot, 2 Rank) UDIMM/SODIMM interface with ECC in the non-flipped configuration is shown in the following figure. Note that for a 64-bit Multi-rank (Single Slot, 2 Rank) UDIMM/SODIMM interface without ECC nibbles 0, and 1 in addition to nibble 8 in the third bank would be free.
Important: The nibble
utilization figure is based on the fixed pinout output by Vivado for this configuration.
Figure 2. Nibble Utilization for 72-bit Multi-Rank (single slot, 2 rank)
UDIMM/SODIMM with ECC (Non-flipped)
