Texas Instruments DS90UB914A-CXEVM: FPD-Link III Deserializer Evaluation Module DS90UB914A-CXEVM DS90UB914A-CXEVM Datenbogen

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DS90UB914A-CXEVM

Chapter 4

SNLU135 – JUNE 2013

Additional Features

4.1

Eye Monitor – CMLOUTP/N

Figure 4-1. Top view of CML access points on Deserializer Board

Connector J3 connects CMLOUTP (or TEST+) and J4 connects to CMLOUTN (or TEST-), which are
present on left hand side of DS90UB914A-CXEVM board. CMLOUTP/N must be enabled by register,
0x3F[4] = 0, to be able to monitor the FPD-Link III serial stream.

4.2

Differential operation over a pair of Coax cables

For differential operation,

1. On DS90UB913A-CXEVM board, change C19 to 0.1uF, remove R80 and mount J3.

2. On DS90UB914A-CXEVM board, change C7 to 0.1uF, remove R74 and mount J2.

4.3

Use of optional Rosenberger HSD connector with STP cable

Following changes are required for using an STP cable with the EVM,

1. On Serializer board, depopulate C16 and C19 capacitors and populate the C17 and C18, 0.1uF. Also,

populate P1 (Rosenberger HSD connector).

2. On Deserializer board, depopulate C6 and C7 capacitors and populate the C4 and C5, 0.1uF. Also,

populate P1 (Rosenberger HSD connector).

3. Set the pin 5 of switch S1 LOW on DES board, to accept input from RIN0+/-.

This configuration will require Serializer and Deserializer both to be powered separately. To enable power
over STP there are two options available as shown in

Figure 4-2

and

Figure 4-3

1. To transmit power over the pair carrying data, mount R30 (0

), R31 (0

), L3 on SER board and R36

), R37 (0

), L1 on DES board.

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2. To transmit power over unused pair of STP cable,

On SER board,

•

Mount L6 (10uH), L7 (10uH)

•

Put jumpers across pin 1 and pin 2 of jumpers JP2

•

Put jumpers across pin 2 and pin 3 of jumpers JP3

(13)

Refer Schematic and BOM section for specification.

Additional Features

SNLU135 – JUNE 2013

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