MB86434 Datasheet, PDF (11/38 Pages) Fujitsu Component Limited. – 5V Single Power Supply Audio Interface Unit (AIU)

MB86434
(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
Step
Data bit value
EV0
EV1
EV2
EV3
sending gain receiving gain receiver volume tone gain
adjustment
adjustment
adjustment
adjustment ^Unit
D4 D3 D2 D1 D0
Typ.
Typ.
Typ.
Typ.
0 00000
–7.5
–7.5
–16
1 00001
–7.0
–7.0
–12
2 00010
–6.5
–6.5
–8
3 00011
–6.0
–6.0
–4
4 00100
–5.5
–5.5
0
5 00101
–5.0
–5.0
4
6 00110
–4.5
–4.5
8
7 00111
–4.0
–4.0
12
8 01000
–3.5
–3.5
9 01001
–3.0
–3.0
10 0 1 0 1 0
–2.5
–2.5
11 0 1 0 1 1
–2.0
–2.0
12 0 1 1 0 0
–1.5
–1.5
13 0 1 1 0 1
–1.0
–1.0
14 0 1 1 1 0
–0.5
–0.5
15 0 1 1 1 1
0.0
0.0
16 1 0 0 0 0
0.5
0.5
17 1 0 0 0 1
1.0
1.0
18 1 0 0 1 0
1.5
1.5
19 1 0 0 1 1
2.0
2.0
20 1 0 1 0 0
2.5
2.5
21 1 0 1 0 1
3.0
3.0
22 1 0 1 1 0
3.5
3.5
23 1 0 1 1 1
4.0
4.0
24 1 1 0 0 0
4.5
4.5
25 1 1 0 0 1
5.0
5.0
26 1 1 0 1 0
5.5
5.5
27 1 1 0 1 1
6.0
6.0
28 1 1 1 0 0
6.5
6.5
29 1 1 1 0 1
7.0
7.0
30 1 1 1 1 0
7.5
7.5
31 1 1 1 1 1
8.0
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
dB
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
Note: Each setting value is determined in relation to the initial setting value.
Returns to initial value at reset (
parts)
EV2 data bits D4, D3 are *.
Table 2 Volume Gain Deviation
Volume control No.
Condition
EV0
EV1
Gain deviation, with respect to
EV3
reference value shown in Table1
EV2
Input frequency = 1020 Hz
Input level = – 20 dBv
Min.
Typ.
Max.
Reference
value
– 0.5 dB
Reference
value
Reference
value
+ 0.5 dB
Reference
value
– 1.0 dB
Reference
value
Reference
value
+ 1.0 dB
Unit
dB
11