PD178016GC-051_15 Datasheet, PDF (74/96 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER WITH BUILT-IN PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO APPLICATIONS

µPD178016GC-051
9. ELECTRONIC VOLUME CONTROLS
9.1 Electronic Volume Controls
The µPD178016GC-051 uses an electronic volume control IC for audio control and selection. It supports two types
of electronic volume control ICs, the TDA7313 and TEA6320. Initial setting diode VOLSEL is set depending on which
electronic volume control IC is being used.
The following electronic volume controls are supported:
Function
Volume
Bass
Treble
Balance
Fader
Loudness
Electronic volume control IC
TDA7313
TEA6320
0 to 63 steps
0 to 40 steps
-7 to +7 steps
-4 to +4 steps
-7 to +7 steps
-4 to +4 steps
L7 to R7 steps
L7 to R7 steps
R7 to F7 steps
R7 to F7 steps
On/off
On/off
See the description of the VOL UP and VOL DOWN keys for an explanation of how each adjustment is made.
9.2 Initial Values of Electronic Volume Controls
When power is first applied to the µPD178016GC-051, the initial values of the electronic volume controls are as
listed below.
Function
Volume
Bass
Treble
Balance
Fader
Loudness
TDA7313
38 steps
0 step
0 step
0 step (CNT)
0 step (CNT)
Off
Initial value
TEA6320
22 steps
72