Sdio Signals Trace Length Guidelines; Table 48: Sdio Trace Length Guidelines; Figure 35: Topology For Sdio - Advantech SOM-5992 Design Manual

2.16.6 SDIO Signals Trace Length Guidelines

Figure 35 : Topology for SDIO
Table 48 : SDIO Trace Length Guidelines
Parameter
Signal Group
Single End
DATA to CLK Maximum Pin to Pin
Length Mismatch
Main Route segment for
CMD/Data/CD#
Main Route segment for CLK)
Spacing to Other Signal Group
LA
LB
Max length of LA+LB
Length matching
Reference Plane
Via Usage
Notes:
1. SOM-5992 don't support SDIO.
Main Route Guidelines
SDIO
50Ω ±10%
500 mils
Minimum Trace Spacing Between Other SD Card and
Interface Signals
5 mils
Minimum Trace Spacing Between Other SD Card and
Interface Signals
15mils
Min. 15mils
SOM-5992 doesn't support SDIO.
Carrier Board Length
"
Data/CMD to Clock must be matched within
Continuous ground only
Max 2 vias
１１９
Notes
1
1
1
1
1
1
1
1
1
200mils 1
1
1