NXP Semiconductors MC92602, User Manual, Page: 17 / 48

Hardware Preparation and Installation
MC92602 Reduced Interface SerDes Design Verification Board User’s Guide, Rev. 3
Freescale Semiconductor 2-7
2.5.1.2 Parallel Outputs
All parallel outputs, both data and status bits, are present at four 2
×
20, 0.100" connectors. Figure 2-5
depicts the 2
×
20, 0.100" output connector numbering scheme, with pin 1 labeled on the board. The parallel
output signals of the MC92602 are 1.5- or 1.8-V HSTL compatible depending on the setting of the V
DDQ
regulator. A complete mapping of the MC92602 outputs to the 2
×
20, 0.100" connectors is listed in
Appendix A, “Connector Signals . ” Note that all even number pins are connected to ground .
Figure 2-5. 2
×
20, 0.100" Output Connector Number Scheme
(Top View)
For information regarding the MC92602 outputs, refer to the MC92602 Quad 1.25 Gbaud Reduced
Interface SerDes Reference Guide .
2.5.2 +V
DDQ
and Ground (GND) Access Connections
The MC92602DVB also has two 2
×
8, 0.100" connectors, PG12 and PG14, with dedicated connections to
the +1.5-V V
DDQ
and ground planes. These are useful for biasing parallel input signals using jumper
cables. All of the odd number pins (1, 3, 5, and 7) are connected to the V
DDQ
plane. All of the even number
pins (2, 4, 6, and 8) are connected to the ground (0.0 V) plane.
2.5.3 Serial Inputs and Outputs
All MC92602 high-speed serial differential inputs and differential outputs are connected to appropriately
labeled pairs of SMA connectors through board traces with a characteristic impedance of 50
Ω
(100-
Ω
differential). The output driver requires a 50-
Ω
parallel termination to mid-rail (+0.9 V nominal for +1.8-V
supply). If the termination voltage is not +0.9 V, the signal must be AC coupled. There is no AC coupling
(DC blocking) of the serial outputs on the board. If needed, AC coupling must be done in-line before any
termination.
During all testing, the serial transmitter outputs should be terminated with 50
Ω
. This can be done by
connecting the serial transmitter outputs to serial receiver inputs, to any laboratory equipment with 50-
Ω
input impedance through in-line AC coupling, or by terminating the outputs with 50-
Ω
SMA terminations.
2.6 Special Test Connection
The MC92602DVB also contains an oscilloscope PCB test socket, labeled TPA. When the MC92602 is
configured in a PLL factory test mode, this test socket enables special access to the PLL.
NOTE
This test mode is for factory testing purposes only. There are no system
applications for this mode and test socket TPA should remain unconnected
at all times.
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