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Factory Set Switch Settings and Jumpers Default Configuration

2. The S2 switch is factory set as shown below in Figure 2-8. 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

Frequency Range

Switch reference Default Setting Function

supported

When SELECTed, configures device in 10 bit mode and

S2.1 - 10 bit mode Select 20MHz to 100MHz hence LVCMOS input DIN10, DIN11 and LVCMOS

output ROUT10, ROUT11 can not be used.

S2.2 - 12 bit high When SELECTed, configures device in 12 bit high

Deselect 15MHz to 75MHz

frequency mode frequency mode

S2.3 - 12 bit low When SELECTed, configures device in 12 bit low

Deselect 10MHz to 50MHz

frequency mode 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 Figure 1-3. This selects power from U4

and U3 LDOs for 1.8V VDD and 3.3V VDDIO respectively.

SNLU135–JUNE 2013 Board Setup Details

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