JEDEC Standard No. 309
-iii-
Contents (cont'd)
Tables
Pages
Table 1 —Product Family Attributes ............................................................................................................ 2
Table 2 — Environmental Parameters (Example) ........................................................................................ 2
Table 3 — Pin Definition .............................................................................................................................. 3
Table 4 — Input/Output Functional Description ......................................................................................... 4
Table 5 — DDR5 SODIMM 262 Pin Connector Pin Wiring Assignments.................................................. 5
Table 6 — PMIC Register setting for the Soft Stop ..................................................................................... 8
Table 7 — DDR5 x8 SDRAM Pad Array ..................................................................................................... 8
Table 8 — DDR5 x16 SDRAM Pad Array ................................................................................................... 9
Table 9 — Decoupling Capacitor Guidelines ............................................................................................. 10
Table 10 — Simulation Conditions Example ............................................................................................. 12
Table 11 — CK, CMD/ADR and CS Group Length Matching Rules ........................................................ 13
Table 12 — Data and Strobe Group Length Matching Rules .................................................................... 16
Table 13 — Plane Referencing ................................................................................................................... 20
Table 14 — Routing Space Constraints ...................................................................................................... 21
Table 15 — Preferred 10 Layer Stackup for SO-DIMMs ........................................................................... 23
Table 16 — Preferred 8 Layer Stackup for SODIMMs .............................................................................. 24
Table 17 — Target Impedance Assignment by Signal Type ...................................................................... 25
Figures
Pages
Figure 1 — Net Structure Example for Two Rank DIMM ......................................................................... 11
Figure 2 — Fly By Topology Example ...................................................................................................... 13
Figure 3 — Command/Address Routing Topology Example ..................................................................... 14
Figure 4 — ALERT_n Wiring Examples ................................................................................................... 17
Figure 5 — RESET_n Wiring Example ..................................................................................................... 18
Figure 6 — Via Compensation Explanation ............................................................................................... 19
Figure 7 — Sideband Bus Wiring Example ................................................................................................ 25
Downloaded by 65 56 (cdm_lj@163.com) on Jun 13, 2022, 1:24 am PDT
JEDEC