參數(shù)資料
型號: AK2307LV
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: SPEECH CODEC for Digital Key telephone (5.0V/3.3V)
中文描述: 語音編解碼器的數(shù)字按鍵電話(5.0V/3.3V)
文件頁數(shù): 25/39頁
文件大?。?/td> 468K
代理商: AK2307LV
ASAHI KASEI [AK2307/LV]
4-2 Tone volume control
The volume control of the tone is done through “Tone Volume Control” register. The gain is changed after two tones are
added, thus the signal level of two tone is always same. Only L-ATT bit in “Tone generator L-frequency select” register
can change the signal level between two tones by -2.5dB.
Tone generator L-frequency select
Register Type : Read Write[Address=0110 D6-D0: (LT_ATT, DIVL_1-DIVL_0, TL_3-TL_0)]
ADD
D7
D6
D5
D4
D3
6
-
LT_ATT
DIVL_1
DIVL_0
TL_3
default
0
0
0
0
0
LT_ATT; Attenuation bit for the low frequency tone generator.
LT_ATT
DTMF Low frequency(Tone generator L)
MS0190-E-05
2005/12
25
D2
TL_2
0
D1
TL_1
0
D0
TL_0
0
Comments
0
1
0dB
-2.5dB
default
*) Gain error of the LT_ATT is +/-1.0dB at the worst case. In this case, LT_ATT is irregular from the DTMF standard.
Tone Volume Control (vol 4)
Register Type : Read Write[Address=0100: D3-D0: (V4_3-V4_0)]
ADD
D7
D6
D5
D4
D3
4
-
-
-
-
V4_3
default
0
0
0
0
V4_[3-0]; Tone volume control.( Volume4 ) The gain range is from 0dB to –45dB by 3dB step.
Gain[dB]
- 3
×
V4
V4_3
V4_2
V4_1
V4_0
VOL4 Tone volume control
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
D2
V4_2
1
D1
V4_1
1
D0
V4_0
1
1
Comment
0dB
-3dB
-6dB
-9dB
-12dB
-15dB
-18dB
-21dB
-24dB
-27dB
-30dB
-33dB
-36dB
-39dB
-42dB
-45dB
default
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