NXP Semiconductors MC92602, User Manual, Page: 12 / 48

Hardware Preparation and Installation
MC92602 Reduced Interface SerDes Design Verification Board User’s Guide, Rev. 3
2-2 Freescale Semiconductor
Figure 2-1. Top Side Part Location Diagram
2.3.2 Setting the Voltage Regulators
The +5.0-V supply is used to power 3 onboard voltage regulators, VR33, VR18, and VR15. These
regulators ge3.3, +1.8, and +1.5/1.8 V (V
DDQ
), respectively. The +3.3-V supply provides power
to the oscillator and clock buffer chips. This supply can be varied over the range +3.3 V ± 0.3 V using the
R12V potentiometer.
The +1.8-V supply is used to power the MC92602 core logic, transceivers, and on-chip phase-locked loop
(PLL). This regulator can be adjusted over the range +1.8 V ± 0.15 V using R22V.
The +1.5-V (HSTL) V
DDQ
supply powers the MC92602 control signal, parallel input, and output interface
circuitry. This voltage level is determined by the desired logic interface. The +1.5-V supply can be adjusted
using a R22V1 potentiometer from +1.5 V + 0.45 V/– 0.15 V. If desired, the +1.5-V regulator can be
adjusted to match the +1.8-V range for evaluation in those systems that do not contain a se1.5-V
supply.
Serial
Differential
SMA
Connectors
+5-V Power
Connectors
Voltage
Horizontal
50-
Ω
Test Traces
Regulators
Crystal
Oscillator Clock
Buffers DIP
Switch
MC92602
+1.5- and +1.8-V
Power
Connectors
50-
Ω
Vertical
Test Traces
2
×
20
Connectors
2
×
10
Connectors
2
×
8
Connector
+3.3-V Power
Connection
2
×
10
Connectors
2
×
8
Connector
HSTL
Reference
Test Point
NOTE:
Freescale has begun the transition of marking Printed Circuit Boards (PCBs) with the Freescale
Semiconductor signature/logo. PCBs may have either Motorola or Freescale markings during the
transition period. These changes will have no impact on form, fit, or function of the current product.