參數(shù)資料
型號(hào)： UPD178024GF
廠商： NEC Corp.
元件分類(lèi)： 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(yè)數(shù)： 76/98頁(yè)
文件大?。?/td> 467K
代理商： UPD178024GF
Data Sheet U14608EJ1V0DS00
76
μ
PD178024GC-051
(3) Loudness control
Each time the LOUD key is pressed, loudness is turned on or off.
When loudness is on, the LOUD pin (pin 39) outputs a low level, and the loudness of the electronic volume IC
is turned on.
If the loudness of the electronic volume IC is on, the gain of the electronic volume IC is amplified by +7.5 dB.
(4) Equalizer processing by electronic volume IC
If it is specified by the initialization switch “EQICSEL” that the equalizer is not used, equalizer processing by
the electronic volume IC is performed.
Equalizer processing by electronic volume IC is performed by setting the gain of the bass and treble in an
equalizer mode.
At this time, the bass adjustment mode and treble adjustment mode are skipped when an electronic volume
mode is selected by using the VOL SEL key in an equalizer mode other than “FLAT”. Therefore, bass and
treble cannot be adjusted.
Bass and treble are adjusted as follows in each equalizer mode.
Equalizer Mode
Range
Gain
Bass
Adjustable by bass adjustment operation
FLAT
Treble
Adjustable by treble adjustment operation
Bass
Fixed to +6 dB (cannot be adjusted)
ROCK
Treble
Fixed to +2 dB (cannot be adjusted)
Bass
Fixed to +2 dB (cannot be adjusted)
CLASSIC
Treble
Fixed to +2 dB (cannot be adjusted)
Bass
Fixed to
4 dB (cannot be adjusted)
POP
Treble
Fixed to
2 dB (cannot be adjusted)
(5) Mute setting of electronic volume
In the mute-on status, the MUTE pin outputs a low level, and the electronic volume IC is muted.
For the mute value of the electronic volume IC, refer to “11.2 Electronic Volume IC (TDA7313) Set Values”.
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