ZHCSHP8B December 2017 – January 2019 AMIC120
PRODUCTION DATA.
DQS[x] lines are point-to-point differential and DQ[x] lines are point-to-point single ended. Figure 5-83 and Figure 5-84 represent the supported topologies. Figure 5-85 and Figure 5-86 show the DQS[x] and DQ[x] routing. Figure 5-87 shows the DQLM for the LPDDR2 interface.
Trace routing specifications for the DQ[x] and the DQS[x] are specified in Table 5-67.
NO. | PARAMETER | MIN | TYP | MAX | UNIT |
---|---|---|---|---|---|
1 | DQ0 nominal length(3)(4) | DQLM0 | mils | ||
2 | DQ1 nominal length(3)(5) | DQLM1 | mils | ||
3 | DQ2 nominal length (3)(6) | DQLM2 | mils | ||
4 | DQ3 nominal length (3)(7) | DQLM3 | mils | ||
5 | DQ[x] skew(8) | 50 | mils | ||
6 | DQS[x] skew | 10 | mils | ||
7 | Via count per each trace in DQ[x], DQS[x] | 2 | |||
8 | Via count difference across a given DQ[x], DQS[x] | 0 | |||
9 | DQS[x]-to-DQ[x] skew(8)(9) | 50 | mils | ||
10 | Center-to-center DQ[x] to other LPDDR2 trace spacing(10)(11) | 4 | w | ||
11 | Center-to-center DQ[x] to other DQ[x] trace spacing(10)(12) | 3 | w | ||
12 | DQS[x] center-to-center spacing(13) | ||||
13 | DQS[x] center-to-center spacing to other net(10) | 4 | w |