參數資料
型號： UPD178024GC
廠商： NEC Corp.
元件分類： 8位微控制器
英文描述： 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述： 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數： 75/98頁
文件大?。?/td> 467K
代理商： UPD178024GC
Data Sheet U14608EJ1V0DS00
75
μ
PD178024GC-051
11. ELECTRONIC VOLUME CONTROL
11.1 Electronic Volume Functions
The
μ
PD178024GC-051 uses an electronic volume IC (TDA7313) to control audio output and for audio selection.
The following electronic volume functions are available.
(1) Setting gain of electronic volume IC
The gain of the electronic volume IC is set to 0 dB.
(2) Adjusting volume
The volume can be adjusted in each of the following modes:
Mode
Function
Adjustment
Range
Default Value on Power Application
Volume
Adjusts volume of main volume.
00 to 63
28
Bass
Adjusts volume of bass (low-frequency region).
6 to +6
00 (no bass compensation)
Treble
Adjusts volume of treble (high-frequency region).
6 to +6
00 (no treble compensation)
Balance
Adjusts volume balance between left and right.
R31 to L31
00 (center position between left and right)
Fader
Adjusts volume balance between front and rear
F31 to R31
00 (center position between front and rear)
However, the fader cannot be adjusted if the fader adjustment function is not specified by the initialization
switch “FADSEL”.
When equalize processing is performed by the electronic volume and when the equalizer mode is other than
“FLAT”, bass and treble cannot be adjusted.
For equalizer processing by the electronic volume, refer to “(4) Equalizer processing by electronic volume”.
To adjust the volume, select an adjustment mode by using the VOL SEL/VOL CLR key, and make an
adjustment by using the VOL UP and VOL DWN keys.
For the specific adjustment method, refer to the description of each of the above keys.
On power application, the volume value in each mode is set to the default value.
On power application and on releasing the standby mode, the main volume value set at that time is returned
to the default value if it is greater than the default value, or is retained if it is less than the default value.
At this time, the volume values in the bass, treble, balance, and fader modes are retained regardless of their
values.
For the correspondence between the displayed volume values and the set values of the electronic volume IC,
refer to “11.2 Electronic Volume IC (TDA7313) Set Values”.
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