TSC2101_08 Datasheet, PDF (66/95 Pages) Texas Instruments – AUDIO CODEC WITH INTEGRATED HEADPHONE, SPEAKER AMPLIFIER AND TOUCH SCREEN CONTROLLER

TSC2101
SLAS392D− JUNE 2003 − REVISED MAY 2005
www.ti.com
REGISTER 1FH: Gain Control for Cell Phone Input and Buzzer Input
BIT
NAME RESET VALUE READ/WRITE
FUNCTION
D15 MUT_CP
1
R/W
Cell phone Input PGA Power−down
1 => Power−down cell-phone input PGA
0 => Power−up cell phone input PGA
D14−D8 CPGA
1000101
R/W
Cell−phone Input PGA Settings.
0000000 => −34.5 dB
0000001 => −34 dB
0000010 => −33.5 dB
...
1000101 => 0 dB
1000110 => 0.5 dB
...
1011100 => 11.5 dB
1011101 => 12 dB
1011110 => 12 dB
1011111 => 12 dB
11xxxxx => 12 dB
Note: These bits are read−only when AGC is enabled for CP_IN (cell-phone input)
and reflect the gain applied by the AGC.
D7
CPGF
0
R
Cell phone Input PGA Flag (Read Only)
0 => Gain applied ≠ PGA register setting
1 => Gain applied = PGA register setting.
Note: This flag indicates when the soft−stepping for cell-phone input is completed.
D6
MUT_BU
1
D5−D2 BPGA
1111
D1
BUGF
0
D0
0
When AGC is enabled for Cell−phone input, this bit is read−only and acts as
Saturation Flag. The read value of this bit indicates the following
0 => AGC is not saturated
1 => AGC is saturated (PGA has reached –34.5 dB or max PGA applicable).
R/W
Buzzer Input PGA Power−down
1 => Power−down buzzer input PGA
0 => Power−up buzzer input PGA
R/W
Buzzer Input PGA settings.
1111 => 0 dB
1110 => −3 dB
1101 => −6 dB
1100 => −9 dB
1011 => −12 dB
1010 => −15 dB
1001 => −18 dB
1000 => −21 dB
0111 => −24 dB
0110 => −27 dB
0101 => −30 dB
0100 => −33 dB
0011 => −36 dB
0010 => −39 dB
0001 => −42 dB
0000 => −45 dB
R
Buzzer PGA Flag (Read Only)
0 => Gain Applied ≠ PGA Register setting
1 => Gain Applied = PGA register setting.
Note: This flag indicates when the soft−stepping for buzzer input is completed.
R
Reserved (Write only 0)
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