SD346EVK National Semiconductor, SD346EVK Datasheet - Page 4

• Manufacturer Part Number: SD346EVK
• Description: BOARD EVAL LMH0346
• Manufacturer: National Semiconductor

Specifications of SD346EVK

• Main Purpose: Video, HD/SD SDI Reclocker
• Utilized Ic / Part: LMH0346
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

header only be used for advanced control applications and only by users familiar with the operation of the
LMH0346SQ SDI Reclocker.
LED indicators are provided near the top of the board to indicate the state of the control inputs and the
indicator outputs of the LMH0346SQ SDI Reclocker. The LED states and their meanings are
summarized in Table 1.
Rate Select
Bypass/Autobypass
Output Mute
Serial Clock Output
Enable
SD/HD Indication
Lock Detection
SD346EVK User Manual
Rev 1.0
Function
Rate0
Rate1
Bypass/Autobypass
O P Mute
SCO_EN
None
None
Table 1. Control and Indicator Function Summary
Switch
© 2008, National Semiconductor Corp.
Rate0
Rate1
Bypass
None
SCO_EN
SD_HD
LOCK DET
4 of 10
Indicator
Rate line pulled
to logic 1
Indicator light
turns red
reclocker forced
to bypass mode
Indicator on
(red)
reclocker output
is muted
Second output
of the
SD346SQEVK
outputs the
recovered clock
Indicator on
(green)
Indicator green
indicates HD or
3 Gbps signal
or no signal
detected
Indicator green
when the
LMH0346SQ
reclocker is
locked to the
incoming signal
LMH0346SQ
LMH0346SQ
Function and
Switch “On”
Indication
Rate line pulled
to logic 0
Indicator light
turns green
LMH0346SQ
reclocker in
normal
(autobypass)
mode
Indicator off
LMH0346SQ
reclocker output
is active
Second output
of the
SD346SQEVK
outputs a copy
of the reclocked
data
Indicator off
Indicator red
indicates SD
signal detected
Indicator red
when the
LMH0346SQ
reclocker is not
locked to the
incoming signal
Function and
Switch “Off”
Indication