TSC2101_07 Datasheet, PDF (71/93 Pages) Texas Instruments – AUDIO CODEC WITH INTEGRATED HEADPHONE, SPEAKER AMPLIFIER AND TOUCH SCREEN CONTROLLER

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TSC2101
SLAS392D− JUNE 2003 − REVISED MAY 2005
BIT
D7−D5
NAME
AGCTG_CELL
RESET
VALUE
000
D4−D1 AGCTC_CELL
0000
D0
AGCEN_CELL
0
READ/
WRITE
R/W
R/W
R/W
FUNCTION
AGC Target Gain for Cell−phone Input.
These three bits set the AGC’s targeted ADC output level.
000 => −5.5 dB
001 => −8.0 dB
010 => −10 dB
011 => −12 dB
100 => −14 dB
101 => −17 dB
110 => −20 dB
111 => −24 dB
AGC Time Constant for Cell Input.
These four bits set the AGC attack and decay time constants. Time constants remain
the same irrespective of any sampling frequency
Attack time Decay time
(ms)
(ms)
0000
8
10
0001 11
100
0010 16
100
0011 20
100
0100
8
200
0101 11
200
0110 16
200
0111 20
200
1000
8
400
1001 11
400
1010 16
400
1011 20
400
1100
8
500
1101 11
500
1110 16
500
1111 20
500
AGC Enable for Cell−phone Input
0 => AGC is off for Cell−phone input
1 => AGC is on for Cell−phone input
(Cell PGA is controlled by AGC
REGISTER 25H: Driver Power-Down Status
Note: All values reflected in control register 25H/page2 are valid only if short circuit is not detected (bit D1 of
control register 1DH/page2 is set to 0)
BIT
NAME
RESET
VALUE
READ/
WRITE
FUNCTION
D15
SPK1FL
1
R
SPK1 Driver Power-down Status
0 => SPK1 driver not powered down.
1 => SPK1 driver powered down.
D14
SPK2FL
1
R
SPK2 Driver Power-down Status
0 => SPK2 driver not powered down.
1 => SPK2 driver powered down.
D13
HNDFL
1
R
OUT32N (Handset) Driver Power-down Status
0 => OUT32N driver not powered down.
1 => OUT32N driver powered down.
D12
VGNDFL
1
R
VGND Driver Power-down Status
0 => VGND driver not powered down.
1 => VGND driver powered down.
D11
LSPKFL
1
R
Loudspeaker Driver Power-down Status
0 => Loudspeaker driver not powered down.
1 => Loudspeaker driver powered down.
D10
CELLFL
1
R
Cell−phone Output (CP_OUT) Driver Power-down Status
0 => Cell-phone output driver not powered down.
1 => Cell-phone output driver powered down.
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