Hardware Description

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2.5

Component Population Configuration

To allow the DP159RSBEVM to support both the default DP input as well as a HDMI test input, there are

many components that need to be removed, placed, or modified depending on the board configuration.

Here’s a summary of the default component configuration for the DP159RSBEVM. In addition, the unused

HDMI receptacle is depopulated.

Function

Reference Designator

DP159RSBEVM

Differential Pair - IN

C11, C12, C13, C14, C15, C16, C24,

populated with 0.1 µF

C25

Differential Pair - HDMI IN

R14, R15, R18, R19, R20, R21, R22,

not populated

R23

SDA / SCL - HDMI

R16, R17, R24, R25, R134, R135

not populated

Differential Pair - DP IN

R112, R109, R111, R108, R110, R107,

populated with 0

Ω

R106, R105

SDA / SCL / HPD - DP

R33, R31, R32 (R126, R136, R140,

populated with 0

Ω

R141 - snoop)

Pullup Differential Pair HDMI IN

R1, R2, R3, R4, R6, R7, R8, R9

populated, but not

connected

2.5.1

HPD Snoop Option

To accommodate systems that do not properly resend DDC commands after HPD goes low, we have

implemented a HPD snoop mode on the DP159RSBEVM. This mode allows the HPD line to be routed

around the DP159, but remain connected to the DP159 on the sink side to allow the DP159 to snoop its

state. This snoop mode is disabled by default on the DP159RSBEVMs.

•

Pop R131, no pop R129, R130, R139 for HPD on

•

No pop R131, pop R129, R130, R139 for HPD snoop only

2.5.2

DDC Snoop Option – not Available for DP159RSB REV B

To accommodate systems that do not properly support clock stretching on the DDC lines, we have

implemented a snoop mode on the DP159RSBEVM. This mode allows the DDC lines to be routed around

the DP159RSB, but remain connected to the DP159RSB on the sink side to allow the DP159RSB to

snoop the DDC traffic. This snoop mode is disabled by default on the DP159RSB REV B1 EVMs.

•

Pop R126, R136, R140, R141. No pop R31, R32 – DP159RSB, DDC snoop only

•

Pop R31, R32. No pop R126, R136, R140, R141- DP159RSB, DDC on

2.6

Local I

Access to DP159’s local I

should be at 3.3 V when I

A standalone external I

external I

TP240141). Sample scripts for this I

Table 2. Aardvark I

J5 pin #

Description

J5 pin

Description

#

1

SCL_CTL

2

GND

3

SDA_CTL

4

NC

5

NC

6

NC

7

NC

8

NC

9

NC

10

GND

6

DP159RSB Evaluation Module

SLLU224A – August 2015 – Revised October 2015

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