
TSC2117
Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D
Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller
www.ti.com
SLAS550A – APRIL 2009 – REVISED JUNE 2009
Page 0/Register 90: AGC Decay Time
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D7–D3
R/W
0000 0
0000 0: AGC decay time = 1
× (512/f
S)
0000 1: AGC decay time = 3
× (512/f
S)
0001 0: AGC decay time = 5
× (512/f
S)
0001 1: AGC decay time = 7
× (512/f
S)
0010 0: AGC decay time = 9
× (512/f
S)
...
1111 0: AGC decay time = 61
× (512/f
S)
1111 1: AGC decay time = 63
× (512/f
S)
D2–D0
R/W
000
000: Multiply factor for the programmed AGC decay time = 1
001: Multiply factor for the programmed AGC decay time = 2
010: Multiply factor for the programmed AGC decay time = 4
...
111: Multiply factor for the programmed AGC decay time = 128
Page 0/Register 91: AGC Noise Debounce
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D7–D5
R/W
000
Reserved. Write only zeros to these bits.
D4–D0
R/W
0 0000
0 0000: AGC noise debounce = 0/fS
0 0001: AGC noise debounce = 4/fS
0 0010: AGC noise debounce = 8/fS
0 0011: AGC noise debounce = 16/fS
0 0100: AGC noise debounce = 32/fS
0 0101: AGC noise debounce = 64/fS
0 0110: AGC noise debounce = 128/fS
0 0111: AGC noise debounce = 256/fS
0 1000: AGC noise debounce = 512/fS
0 1001: AGC noise debounce = 1024/fS
0 1010: AGC noise debounce = 2048/fS
0 1011: AGC noise debounce = 4096/fS
0 1100: AGC noise debounce = 2
× 4096/f
S
0 1101: AGC noise debounce = 3
× 4096/f
S
0 1110: AGC noise debounce = 4
× 4096/f
S
...
1 1110: AGC noise debounce = 20
× 4096/f
S
1 1111: AGC noise debounce = 21
× 4096/f
S
Page0 /Register 92: AGC Signal Debounce
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D7–D4
R/W
0000
Reserved. Write only zeros to these bits.
D3–D0
R/W
0000
0000: AGC signal debounce = 0/fS
0001: AGC signal debounce = 4/fS
0010: AGC signal debounce = 8/fS
0011: AGC signal debounce = 16/fS
0100: AGC signal debounce = 32/fS
0101: AGC signal debounce = 64/fS
0110: AGC signal debounce = 128/fS
0111: AGC signal debounce = 256/fS
1000: AGC signal debounce = 512/fS
1001: AGC signal debounce = 1024/fS
1010: AGC signal debounce = 2048/fS
1011: AGC signal debounce = 2
× 2048/f
S
1100: AGC signal debounce = 3
× 2048/f
S
1101: AGC signal debounce = 4
× 2048/f
S
1110: AGC signal debounce = 5
× 2048/f
S
1111: AGC signal debounce = 6
× 2048/f
S
REGISTER MAP
127