TEA6880 Philips Semiconductors, TEA6880 Datasheet - Page 12

• Manufacturer Part Number: TEA6880
• Description: Up-level Car radio Analog Signal Processor CASP
• Manufacturer: Philips Semiconductors

Philips Semiconductors
7.5.1
The source selector allows the selection between
6 sources:
Via the chime/diagnostic mono input a chime input signal
can be sent to any audio output, at any volume level.
7.5.2
The output of the source selector is fed into the loudness
circuit via the external capacitors C
LOPI) and C
the external circuits for the left and the right channel only a
bass boost or bass and treble boost is available. With the
external circuits shown in Figs 13 and 15 the curves from
Figs 14 and 16 will be obtained (without influence of C
respectively C
7.5.3
The volume 1 control follows behind the loudness circuit.
The control range of volume 1 is between +20 and 36 dB
in steps of 1 dB.
7.5.4
The output signal of the volume 1 control is fed into the
treble control stage. The control range is between
+14 and 14 dB in steps of 2 dB. Fig.20 shows the control
characteristic with external capacitors of 10 nF.
2000 May 08
2 external stereo inputs (ALI, ARI, BLI and BRI)
1 external symmetrical stereo input (CLIP, CRIP and
CCOM)
1 external symmetrical mono input (MONOP and
MONON)
1 internal stereo input (AM/FM)
1 chime/diagnostic mono input (CHIME).
Up-level Car radio Analog Signal
Processor (CASP)
S
L
V
T
OUDNESS
REBLE
OURCE SELECTOR
OLUME
KVR
KVR
(pins ROPO and ROPI). Depending on
1
).
KVL
(pins LOPO and
KVL
12
7.5.5
The bass control is the next stage. The characteristic of the
bass curves depends upon the external circuits at
pins LBO/LBI (left channel) and RBO/RBI (right channel)
and also upon the setting of BSYM bit (MSB of the bass
control byte). With BSYM = 1, an equalizer characteristic
and with BSYM = 0, a shelving characteristic is obtained.
Figures 17 and 18 show the bass curves with an external
circuit of 2
different values for BSYM. Figure 19 shows the bass
curves with an external capacitor of 47 nF for each
channel and BSYM = 0, for boost and cut.
7.5.6
The four volume 2 blocks are located at the end of the
tone/volume control. In addition to volume control (same
settings as volume 2) also the balance and fader functions
are performed by individual attenuation offsets for the four
attenuators. The control range of these attenuators is
56 dB in steps of 1 dB and additional the steps 58.5 dB,
7.5.7
The RSA selector provides the possibility to select an
alternative source for the rear channels. In this event rear
channels are only controlled by volume 2 function.
7.5.8
With the chime adder circuit the chime input signal can be
summed with the left front and/or right front audio, or be
turned off.
62 dB, 68 dB, and a mute step.
B
V
RSA
C
ASS
OLUME
HIME ADDER
220 nF and R = 3.3 k for each channel with
SELECTOR
2
Product specification
TEA6880H