Factory Set Switch Settings and Jumpers Default Configuration
11
SNLU135B – June 2013 – Revised April 2016
Copyright © 2013–2016, Texas Instruments Incorporated
Board Setup Details
2. The S2 switch is factory set as shown below in
. This will configures the SER/DES link in 10
bit mode.
Only one switch is allowed to be in SELECT mode at a time.
Figure 2-8. Switch S2: Default Settings on Deserializer Board
Table 2-2. Switch S2: Deserializer Board
Switch reference
Default Setting
Frequency Range
supported
Function
S2.1 - 10 bit mode
Select
50MHz to 100MHz
When SELECTed, configures device in 10 bit mode and
hence LVCMOS input DIN10, DIN11 and LVCMOS
output ROUT10, ROUT11 can not be used.
S2.2 - 12 bit high
frequency mode
Deselect
37.5MHz to 75MHz
When SELECTed, configures device in 12 bit high
frequency mode
S2.3 - 12 bit low
frequency mode
Deselect
25MHz to 50MHz
When SELECTed, configures device in 12 bit low
frequency mode
3. S3 is a momentary switch located at the bottom center of the DES board. Press this switch to clear the
output of latches for low pulse on LOCK and PASS.
4. S4 is a momentary switch for Receiver Power Down.
5. On JP6 and JP12, a 2-pin jumper is factory placed as shown in
. This selects power from U4
and U3 LDOs for 1.8V VDD and 3.3V VDDIO respectively.
