Laboratory Equipment and Quick Setup Evaluation
MC92602 Reduced Interface SerDes Design Verification Board User’s Guide, Rev. 3
Freescale Semiconductor
3-5
3.2.2
Basic Eye Observation—Test Procedure
1. Connect the MC92Q602DVB and test equipment as described in
Figure 3-1
and
Table 3-4
. This
will place the MC92602 in PN generation mode with the MC92602 in reset.
Step 2 and 3 may be skipped if previously performed when setting up the DVB.
2. Apply +5.0 V to the evaluation board. Verify voltage levels of +3.3 V, +1.8 V, and +V
DDQ
(1.5 V)
regulators at connectors T10, T7, and T6, respectively. If necessary, adjust R12V, R22V, and
R22V1 to obtain desired voltage levels.
3. Verify that the reference clock frequency at CLK_OUT5 is 125 MHz
(period = 8 ns).
4. Observe XMIT_
x
_P or XMIT_
x
_N output. Since the chip is in reset, the transmitter should show
a constant output level at ground.
5. Connect the RESET (connector CTRL_SIG_0, Pin 11) to a V
DDQ
access connection. This releases
the RESET signal.
6. Observe XMIT_
x
_P or XMIT_
x
_N. The transmitter should now be outputting random data.
Setting the digital sampling oscilloscope to infinite persistence mode will display a data-eye. An
example of a data-eye is shown in
Figure 3-2
.
Figure 3-2. MC92602 Data-Eye Using Recommended Test Setup
Summary of Contents for MC92602
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