
I2C Interface
Intel® Quark™ SE Microcontroller C1000
Platform Design Guide
June 2017
26
Document Number: 334715-004EN
Figure 10. I
2
C Point-to-Point Topology
The following table shows detailed routing requirements for the I
2
C bus.
Table 7. I
2
C Point-to-Point Platform Routing Guidelines
Leveraged from Intel® Quark™ SoC
I
2
C
I
2
C (SDA, SCL)
Breakout
Segment trace
Transmission Line Segment
Breakoutsoc
L1-L4
Routing Layer (Microstrip/Stripline)
MS/SL
MS/SL
Characteristic Impedance
50Ω + 10% (MS)
50Ω + 10% (SL)
50Ω + 10% (MS)
50Ω + 10% (SL)
Trace Width (w)
Meet impedance or
3.5 mils minimum
Meet impedance
Trace Spacing (S1): Between SPI signals
4 mils
2W
Trace Spacing (S2): Between SPI signals
and other signals
5 mils
2W
Trace Length
<500 mils
15000 mils
Total Trace Length
<15000 mils; Ctotal <400pF
Reference
VSS referencing
Pull-up Resistor Rpu
Refer to table below