Pericom Semiconductor Corp.
www.pericom.com
Page 12 of 19
11/5/2013
AN
05/05/04
The USB signal from Low-Speed USB device through PI3USB102 is compared with USB 2.0 Low Speed
DOWNSTREAM
– NEAR END eye mask. Figure 9a and Figure 9b show the PASSING eye-diagram of which the USB
2.0 Full Speed signal passing through PI3USB102.
Figure 9a. Low Speed Eye-Diagram of connection to M+/M-
Measurement Name
Minimum
Maximum
Mean
pk-pk
Standard Deviation
RMS
Population
Status
Eye Diagram Test
-
-
-
-
-
-
-
Pass
Signal Rate
1.493664Mbps 1.509021Mbps 1.499836Mbps 0.0000bps
4.024761kbps
1.500093Mbps
31
Pass
Crossover Voltage
1.706667 V
1.856364 V
1.796314 V
149.6970mV
34.28785mV
1.796626 V
22
Pass
EOP Width
-
-
1.339729us
-
-
-
1
Pass
Consecutive Jitter
-2.837954ns
3.262011ns
0.0000s
6.099965ns
1.466047ns
1.430715ns
21
Pass
Paired JK Jitter
-1.321092ns
2.050337ns
275.5051ps
3.371429ns
1.160625ns
1.135010ns
10
Pass
Paired KJ Jitter
-4.145274ns
2.336051ns
152.1313ps
6.481325ns
2.299580ns
2.173396ns
9
Pass
Table 7. Low Speed Signal Quality Measurement of connection to M+/M-