LMH1982SQEEVAL National Semiconductor, LMH1982SQEEVAL Datasheet - Page 10

• Manufacturer Part Number: LMH1982SQEEVAL
• Description: BOARD EVAL FOR LMH1982SQE
• Manufacturer: National Semiconductor

Specifications of LMH1982SQEEVAL

• Main Purpose: Video, Video Processing
• Utilized Ic / Part: LMH1982SQE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

5.2.4 Device Status
The Device Status panel shows red/green indicators relating to the PLL lock status and input
reference status in genlock mode. To update the device status indicators, click the READ ALL
button or use the auto-update function. To auto-update the device status indicators, click the
check box accordingly and select the time interval from the drop down list.
The REFERENCE status indicates when valid signal has been detected at the HREF input of the
selected reference when operating in genlock mode. Green indicates a valid reference, while red
indicates loss of reference. In free run mode, the REFERENCE status indicator will be red when
there is no input reference.
The HD PLL LOCKED status indicates whether the HD output clock is phase-locked to the
27MHz VCXO clock. Green indicates the HD clock is locked, while red indicates it is not
locked.
The SD PLL LOCKED status indicates whether the SD output clock is phase-locked to the
HREF input signal. Green indicates the SD clock is locked, while red indicates it is not locked.
Refer to the LMH1982 datasheet for more information about the device status bit and status
output pins.
5.2.5 Address Read/Write
This panel allows you to read from and write to a single register address.
To read from a register, select an address (in hex) from the Register drop down list, click READ,
and the data will appear in the Read Data drop down list. The Read Data list can be selected to
show the data in hex, decimal, and binary form.
National Semiconductor Corp.
Rev. 2.1, 5/13/2008
Page 10 of 20