tda8421 NXP Semiconductors, tda8421 Datasheet - Page 7

• Manufacturer Part Number: tda8421
• Description: Hi-fi Stereo Audio Processor; I2c Bus
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Truth tables
Truth tables for the switch functions
Table 3 Input selector
Table 5 Stereo/pseudo stereo/spatial stereo
Table 7 Output for external switch
Truth tables for the volume base and treble controls.
Table 8 Volume control
Note
1. The values of CH1 and CH2 are in 2 dB/step measured in dBs.
May 1988
IN1
IN2
spatial
stereo
pseudo
-----------
ground
open collector
16
14
46
48
62
Hi-fi stereo audio processor; I
90
90
CH1
0
function
2
62
choise
90
90
90
90
CH2
EXSN
1
1
0
0
0
0
V
5
1
1
0
0
STL
1
0
1
1
1
0
2
IS
0
1
V
C bus
1
0
1
0
1
0
EXS
EFL
4
7
1
0
1
1
0
0
Table 4 Mode selectors
Table 6 Mute
Notes
1. Attenuation
stereo
sound A
sound B
----------
active; automatic
after POR
not active
V
3
mode
(1)
1
0
1
0
1
0
90 dB; POR = Power-On Reset.
V
mute
1
1
0
0
2
ML0
CH1
1
0
1
0
1
0
1
0
1
0
ML1
V
Product specification
1
1
1
0
0
TDA8421
MH0
1
0
1
0
1
0
CH2
V
1
0
1
0
MU
MH1
1
0
0