Quick Start User Guide
6
Quick Start User Guide
1.
Connect J19 – VDD = 2.5 V and GND.
2.
Connect 50
Ω
SMA cables to the board.
•
The input signals J1 to J8 can be connected from a pattern generator.
•
The output signals J9 to J16 can be connected to a scope.
3.
Set the input equalization level.
•
For external pin control for the equalization level:
–
Set PIN_MODE = H by using the switch - SW2, pin 1 to the “OFF” position
–
Set BST_[2:0]= 111 (maximum level) by using the switch - SW2, pin 2,3,4 to the “OFF”
position.
–
Note, this will set the level on all 4 channels (global setting).
•
For SMBUS control for the equalization level:
–
Set PIN_MODE = L (SMBUS mode) by using the switch - SW2, pin 1 to the “ON” position.
–
Please refer to datasheet for register map for equalization.
4.
Set the output DE – de-emphasis level
.
•
For external pin control for the de-emphasis level:
–
Set PIN_MODE = H by using the switch – SW2, pin 1 to the “OFF” position.
–
Set DE_SEL = open (-6dB) by using the switch – SW1, pin 4,5,6 to the “OFF” position.
–
Note, this will set the level on all 4 channels (global setting).
–
Also the switch provides the ability to set this pin to OPEN or VDD or 20k to GND or GND.
•
Only 1 switch to the “ON” position is allowed.
–
Do not have both VDD and GND to the “ON” position or there will be a VDD to GND short.
•
For SMBUS control for the equalization level:
–
Set PIN_MODE = L (SMBUS mode) by using the switch – SW2, pin 1 to the “ON” position.
–
Write to Reg_08-bit 3,2 to set the VOD level.
5.
Set the VOD – output differential voltage level.
•
For external pin control for the de-emphasis level:
–
Set PIN_MODE = H by using the switch – SW2, pin 1 to the “OFF” position.
–
Note, this will set the level on all 4 channels (global setting).
–
Also, the switch provides the ability to set this pin to OPEN or VDD or 20k to GND or GND.
•
Only 1 switch to the “ON” position is allowed.
–
Do not have both VDD and GND to the “ON” position or there will be a VDD to GND short.
•
For SMBUS control for the equalization level:
–
Set PIN_MODE = L (SMBUS mode) by using the switch – SW2, pin 1 to the “ON” position.
–
Write to Reg_08-bit 3,2 to set the VOD level.
5
SNLU152 – October 2013
DS100BR410EVK-4 User Guide: 4 Channels SMA Evaluation Kit
Copyright © 2013, Texas Instruments Incorporated