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| 型號： | UPD178024GC-051-8BT |
| 廠商： | NEC Corp. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 8-BIT SINGLE-CHIP MICROCONTROLLER WITH ON-CHIP PRESCALER, PLL FREQUENCY SYNTHESIZER, AND IF COUNTER FOR AUTOMOTIVE FM/MW/LW RADIO WITH CD PLAYER |
| 中文描述： | 8位單片機具有片上標(biāo)器，鎖相環(huán)頻率合成器，如柜臺，汽車調(diào)頻/中波/龍運收音機帶CD播放器 |
| 文件頁數(shù)： | 76/98頁 |
| 文件大?。?/td> | 467K |
| 代理商： | UPD178024GC-051-8BT |
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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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