Table 19. Rtc Signals; Table 20. Rtc Point-To-Point Topology Platform Routing Guidelines; Table 21. 32Mhz Crystal Oscillator Specification - Intel Quark SE Series Platform Manual

Table 19. RTC Signals

Signal Name
OSC32_IN
OSC32_OUT

Table 20. RTC Point-to-Point Topology Platform Routing Guidelines

OSC32_IN/OSC32_OUT SoC Breakout
Transmission Line
Segment
Stackup Layer
(Microstrip/Stripline)
Characteristic
Impedance (SE)
Trace Width (w)
Trace Spacing (S):
to other signals
Trace Length
Total Trace Length
Number of vias allowed
Via stub length
Guidelines

Table 21. 32Mhz Crystal Oscillator specification

Symbol
Fo Crystal frequency
Cesr Crystal ESR
Cm Crystal Motional Cap
Co Crystal Shunt Cap
CL Crystal Load Cap
Ftol Frequency Tolerance
Dlev Drive Level (25Ω)
Intel® Quark™ SE Microcontroller C1000
Platform Design Guide
40
Direction/Type
I Analog
O Analog
TL1
MS/SL
50Ω +/- 10%
Meet impedance
15 mils
< 250 mils
Total Length < 1000 mils
2
< 20 mils
 Reduce trace capacitance by minimizing the RTC trace length.
 Reduce trace signal coupling by avoiding the routing of high speed signals
close to RTC signals.
 We highly recommend that you use a ground guard plane.
 Do not route RTC as differential signals.
Parameter
32
12.68
3.34
0.84
-30
Crystal Input: This signal is connected to
the 32.768 kHz Crystal
Crystal Output: This signal is connected to
the 32.768 kHz Crystal
RTC Crystal
Main Routing
TL2
MS/SL
50Ω +/- 10%
Meet impedance
25 mils
Min. Typ.
32
14.41
10
Document Number: 334715-004EN
Clocking
Description
Max. Unit
32 Mhz
50 Ω
3.54 pF
1.5 pF
pF
30 ppm
10 uW
June 2017