Table of Contents
Advertisement
1.2 SDI Input (J6 and J7)
The EB-GS3471-00 includes two 3G-SDI inputs DC-coupled to the GS3471. The applied
video stream will first pass through Semtech's GS3140 Cable Equalizer (PDS-060939)
before entering the DDI input pin of the GS3471. The pin J6 provides a DC path to the
GS3471 through the GS3140, while the pin J7 provides a direct AC path to the GS3471.
1.3 Switch Settings (SW1 and SW2)
1.3.1 GS3471 Switch Settings (SW1)
Figure 1-2
shows the switch settings for SW1 which control the static configuration
input of the GS3471.
LOGIC "HIGH"
LOGIC HIGH
LOGIC "LOW"
LOGIC LOW
Figure 1-2: GS3471 Switch Configuration
Table 1-1: SW1 Switch Settings
Switch
SW1.1
SW1.2
SW1.3
GS3471
Evaluation Board User Guide Rev.3
PDS-061243
March 2018
Pin
Description
When HIGH, the GS3471 JTAG interface is in
operational mode.
JTAG TRST
When LOW, the GS3471 JTAG interface is held
in reset.
When HIGH, the GS3471 JTAG interface is in
operational mode.
JTAG interface
enable
When LOW, the GS3471 JTAG interface is
disabled.
Used to select the video output bus width.
BIT20/BIT10
When HIGH, 20-bit bus width.
When LOW, 10-bit bus width.
www.semtech.com
6 of 22
Semtech
Proprietary & Confidential
Advertisement
Table of Contents
