upd178016 Renesas Electronics Corporation., upd178016 Datasheet - Page 33

• Manufacturer Part Number: upd178016
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Momentary key
VOL DOWN
VOL UP
These keys are used to adjust each electronic volume control function (volume, bass, treble, balance, fader)
in electronic volume control mode.
Either of the following two types of electronic volume controls can be selected.
(1) TDA7313 (initial setting diode VOLSEL = 0)
(2) TEA6320 (initial setting diode VOLSEL = 1)
(1) TDA7313
Display (64 steps)
Attenuation [dB]
Display (15 steps)
Attenuation [dB]
Display (15 steps)
Attenuation [dB]
TDA7313 can be used when initial setting diode VOLSEL = 0.
(a) Volume
(b) Bass
(c) Treble
These keys are valid during normal/volume display.
The electronic volume control function becomes valid when the key is pressed, and the volume is
incremented or decremented in units of 1.25 [dB]. When the key is held down for about 0.5
seconds, the volume is successively incremented or decremented by 1.25 [dB] every 0.1 seconds,
until the key is released.
The initial value when the power is first applied is VOLUME 38 (-31.25 [dB]).
The bass control function is valid only in bass display mode.
This function becomes valid as soon as either of these keys is pressed, and the bass is
incremented or decremented in units of 2 [dB].
When the key is held down for about 0.5 seconds, the bass is successively incremented or
decremented at a rate of 2 [dB] every 0.3 seconds, until the key is released.
The initial value when the power is first applied is BASS 0 (0 [dB]).
The treble control function is valid only in treble display mode.
This function becomes valid as soon as either of these keys is pressed, and the treble is
incremented or decremented in units of 2 [dB].
When the key is held down for about 0.5 seconds, the treble is successively incremented or
decremented every 0.3 seconds in units of 2 [dB], until the key is released.
The initial value when the power is first applied is TRE 0 (0 [dB]).
BAS - 7
-14
TRE - 7
-14
VOL 0
-78.75
-12
-12
BAS - 6
TRE - 6
Description
VOL 1
-77.50
...
...
...
...
VOL 2
-76.25
BAS 0
0
TRE 0
0
...
...
...
...
...
...
PD178016GC-051
12
12
VOL 62
-1.25
BAS + 6
TRE + 6
14
14
VOL 63
0
BAS + 7
TRE + 7
33