MSC8144 Freescale Semiconductor, MSC8144 Datasheet - Page 49

• Manufacturer Part Number: MSC8144
• Description: Quad Core Digital Signal Processor
• Manufacturer: Freescale Semiconductor

2.7.5.7
Since the LP-Serial electrical specification are guided by the XAUI electrical interface specified in Clause 47 of IEEE Std.
802.3ae-2002™, the measurement and test requirements defined here are similarly guided by Clause 47. In addition, the CJPAT
test pattern defined in Annex 48A of IEEE Std. 802.3ae-2002 is specified as the test pattern for use in eye pattern and jitter
measurements. Annex 48B of IEEE Std. 802.3ae-2002 is recommended as a reference for additional information on jitter test
methods.
2.7.5.8
For the purpose of eye template measurements, the effects of a single-pole high pass filter with a 3 dB point at (baud
frequency)/1667 is applied to the jitter. The data pattern for template measurements is the continuous jitter test pattern (CJPAT)
defined in Annex 48A of IEEE Std. 802.3ae. All lanes of the LP-Serial link shall be active in both the transmit and receive
directions, and opposite ends of the links shall use asynchronous clocks. Four lane implementations shall use CJPAT as defined
in Annex 48A. Single lane implementations shall use the CJPAT sequence specified in Annex 48A for transmission on lane 0.
The amount of data represented in the eye shall be adequate to ensure that the bit error ratio is less than 10
shall be measured with AC coupling and the compliance template centered at 0 Volts differential. The left and right edges of
the template shall be aligned with the mean zero crossing points of the measured data eye. The load for this test shall be 100 Ω
resistive
Freescale Semiconductor
1.25 GBaud
2.5 GBaud
3.125 GBaud
±
5% differential to 2.5 GHz.
–V
–V
Table 37. Receiver Input Compliance Mask Parameters Exclusive of Sinusoidal Jitter
V
V
DIFF
DIFF
DIFF
DIFF
Measurement and Test Requirements
Eye Template Measurements
max
min
min
max
Receiver Type
0
0
MSC8144 Quad Core Digital Signal Processor Data Sheet, Rev. 1
Figure 15. Receiver Input Compliance Mask
A
V
DIFF
B
min (mV)
100
100
100
Time (UI)
1 – B
V
DIFF
max (mV)
800
800
800
1 – A
Electrical Characteristics
A (UI)
0.275
0.275
0.275
–12
. The eye pattern
1
B (UI)
0.400
0.400
0.400
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