NXP Semiconductors MC92602 User Manual

Contents

Laboratory Equipment and Quick Setup EvaluationMC92602 Reduced Interface SerDes Design Verification Board User’s Guide, Rev. 3Freescale Semiconductor 3-53.2.2 Basic Eye Observation—Test Procedure1. Connect the MC92Q602DVB and test equipment as described in Figure 3-1 and Table 3-4. Thiswill 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 +VDDQ (1.5 V)regulators at connectors T10, T7, and T6, respectively. If necessary, adjust R12V, R22V, andR22V1 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 showa constant output level at ground.5. Connect the RESET (connector CTRL_SIG_0, Pin 11) to a VDDQ access connection. This releasesthe 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. Anexample of a data-eye is shown in Figure 3-2.Figure 3-2. MC92602 Data-Eye Using Recommended Test Setup