SM6453AB Datasheet, PDF (10/12 Pages) Nippon Precision Circuits Inc – 3-wire Serial Data Volume Control for Headphone Amplifiers IC

SM6453AB
Microcontroller data description
“L” = V_IL1 level, “H” = V_IH1 level
I D15 to D12: Not used (Don’t Care) bits. Can be either “L” or “H”.
I D11: AGC bit. OFF when “L”, and ON when “H”.
D11
AGC function
L
OFF
H
ON
I D10, D9: Bass boost control bit.
D9
D10
Bass boost
characteristics
L
L
OFF
H
L
BB1
H
H
BB2
I D8: Input select bit. LIN1 and RIN1 when “L”, and LIN2 and RIN2 when “H”.
D8
Selected inputs
L
LIN1, RIN1
H
LIN2, RIN2
I D7 to D0: Attenuation (ATT) bits.
Amp gain
+ 12dB
+ 11dB
+ 10dB
:
− 3dB
− 4dB
− 5dB
:
− 52dB
− 53dB
− 54dB
:
− 67dB
− 68dB
MUTE
MUTE
MUTE
MUTE
MUTE
EVR ATT value
D7
D6
D5
D4
D3
D2
D1
D0
HEX
0dB
L
L
L
L
L
L
L
L
00
− 1dB
L
L
L
L
L
L
L
H
01
− 2dB
L
L
L
L
L
L
H
L
02
:
:
:
:
:
:
:
:
:
:
− 15dB
L
L
L
L
H
H
H
H
0F
− 16dB
L
L
L
H
L
L
L
L
10
− 17dB
L
L
L
H
L
L
L
H
11
:
:
:
:
:
:
:
:
:
:
− 63dB
L
L
H
H
H
H
H
H
3F
− 64dB
L
H
L
L
L
L
L
L
40
− 65dB
L
H
L
L
L
L
L
H
41
:
:
:
:
:
:
:
:
:
:
− 79dB
L
H
L
L
H
H
H
H
4F
− 80dB
L
H
L
H
L
L
L
L
50
MUTE
L
H
L
H
L
L
L
H
51
MUTE
L
H
L
H
L
L
H
L
52
MUTE
:
:
:
:
:
:
:
:
:
MUTE
H
H
H
H
H
H
H
L
FE
MUTE
H
H
H
H
H
H
H
H
FF
Note: At system reset, AGC = OFF, bass boost = OFF, LIN1 and RIN1 input, MUTE are selected.
NIPPON PRECISION CIRCUITS—10