a8291 Allegro MicroSystems, Inc., a8291 Datasheet - Page 16

• Manufacturer Part Number: a8291
• Description: A8291 Single Lnb Supply And Control Voltage Regulator
• Manufacturer: Allegro MicroSystems, Inc.

A8291
Bit 0
Bit 1
Bit 2
Bits 3 to 7
CAD
–
TDET
Single LNB Supply and Control Voltage Regulator
Cable between LNB and the LNB head is disconnected. When cable disconnect test
mode is applied, the LNB linear regulator is disabled and a 1 mA current source is
applied between the BOOST and LNB output. If the LNB volts rise above 21 V,
CAD will be set to 1. The CAD bit is reset if the LNB volts drop below 19.95 V.
Not used.
Tone Detect. When tone is enabled by whatever option, or if a tone signal is re-
ceived from the LNB, TDET will be set to 1 if the tone appears at the LNB output.
When the tone is disabled and no tone is received from the LNB, TDET is reset.
Not used.
Table 7. Status Register 2
Bit
0
1
2
3
4
5
6
7
Name
TDET
CAD
–
–
–
–
–
–
Cable Disconnected
Tone Detect
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Function
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
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