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參數(shù)資料
| 型號(hào)： | MB86434PF |
| 廠商： | FUJITSU LTD |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | 5V Single Power Supply Audio Interface Unit (AIU) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, QFP-64 |
| 文件頁數(shù)： | 11/38頁 |
| 文件大?。?/td> | 574K |
| 代理商： | MB86434PF |
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MB86434
11
(4) Electronic Volume Controls
There are four different electronic volume controls, EV0 through EV3, with the following specifications. Electronic
volume control settings are made by the SRD, SRC and STB signals, and setting values are reset by the XPRST
signal. However, settings are not reset by PSC0, PSC1, PSC2 power-down mode operations.
Table 1 Relation of Volume Control Data bit Values to Gain
Note: Each setting value is determined in relation to the initial setting value.
Returns to initial value at reset (
EV2 data bits D
4
, D
3
are *.
parts)
Table 2 Volume Gain Deviation
Step
Data bit value
EV0
sending gain
adjustment
EV1
receiving gain
adjustment
EV2
receiver volume
adjustment
EV3
tone gain
adjustment
Unit
D
4
D
3
D
2
D
1
D
0
Typ.
Typ.
Typ.
Typ.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
–7.5
–7.0
–6.5
–6.0
–5.5
–5.0
–4.5
–4.0
–3.5
–3.0
–2.5
–2.0
–1.5
–1.0
–0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
–7.5
–7.0
–6.5
–6.0
–5.5
–5.0
–4.5
–4.0
–3.5
–3.0
–2.5
–2.0
–1.5
–1.0
–0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
–16
–12
–8
–4
0
4
8
12
–7.5
–7.0
–6.5
–6.0
–5.5
–5.0
–4.5
–4.0
–3.5
–3.0
–2.5
–2.0
–1.5
–1.0
–0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
dB
Volume control No.
Condition
Min.
Typ.
Max.
Unit
EV0
EV1
EV3
Gain deviation, with respect to
reference value shown in Table1
Input frequency = 1020 Hz
Input level = – 20 dBv
Reference
value
– 0.5 dB
Reference
value
Reference
value
+ 0.5 dB
dB
EV2
Reference
value
– 1.0 dB
Reference
value
Reference
value
+ 1.0 dB
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