lc75421m Sanyo Semiconductor Corporation, lc75421m Datasheet - Page 6

• Manufacturer Part Number: lc75421m
• Description: Electronic Volume Controller For Cars
• Manufacturer: Sanyo Semiconductor Corporation

Control Timing and Data Format
To control the LC75421M, input specified serial data to the CE, CL, and DI pins.
The data configuration consists of a total of 52 bits broken down into 8 address bits and 44 data bits.
Fader step control
Super bass control
0 0 0 0
1 0 0 0
0 1 0 0
1 1 0 0
0 0 1 0
1 0 1 0
0 1 1 0
1 1 1 0
0 0 0 1
1 0 0 1
0 1 0 1
1 1 0 1
0 0 1 1
1 0 1 1
0 1 1 1
1 1 1 1
0 0 0 0
1 0 0 0
0 1 0 0
1 1 0 0
0 0 1 0
1 0 1 0
0 1 1 0
1 1 1 0
0 0 0 1
1 0 0 1
0 1 0 1
CE
DI
CL
CE
CL
DI
D
B
1 0 0 0 0 0 0 1
0
0
B
D
1
1
Address code
STEP0(FLAT)
STEP1
STEP2
STEP3
STEP4
STEP5
STEP6
STEP7
STEP8
STEP9
STEP10(BOOST max)
–60 dB
–45 dB
–35 dB
–25 dB
–20 dB
–18 dB
–16 dB
–14 dB
–12 dB
–10 dB
– dB
D
B
2
2
–8 dB
–6 dB
–4 dB
–2 dB
B0 B1 B2 B3 A0 A1 A2 A3
0 dB
B
D
3
3
D
A
0
4
A
D
1
5
D
A
2
6
Bass control
A
D
3
7
1 1 1 0
0 1 1 0
1 0 1 0
0 0 1 0
1 1 0 0
0 1 0 0
1 0 0 0
0 0 0 0
1 0 0 1
0 1 0 1
1 1 0 1
0 0 1 1
1 0 1 1
0 1 1 1
1 1 1 1
D
8
Treble control
D
9
1 1 1 0
0 1 1 0
1 0 1 0
0 0 1 0
1 1 0 0
0 1 0 0
1 0 0 0
0 0 0 0
1 0 0 1
0 1 0 1
1 1 0 1
0 0 1 1
1 0 1 1
0 1 1 1
1 1 1 1
10
D
Boost
STEP15
STEP14
STEP13
STEP12
STEP11
STEP10
STEP9
STEP8
STEP7
STEP6
STEP5
STEP4
STEP3
STEP2
STEP1
Cut
11
D
12
D
1 s
min
13
D
Boost
STEP15
STEP14
STEP13
STEP12
STEP11
STEP10
STEP9
STEP8
STEP7
STEP6
STEP5
STEP4
STEP3
STEP2
STEP1
Cut
14
D
1 s
min
15
D
16
D
1 s
min
17
D0
D
Volume control
1 s
18
D
1 s
min
19
D
D1 D2 D3 D4 D5
T
LC75421M
20
D
DEST
21
D
22
D
23
D
Input switch control (1)
24
D
25
D
26
D
27
Fader
rear/front
control
D
0
1
Caution: Be sure to set D36 to D38 and D40 to D43
Input gain control
0 0 0 0
1 0 0 0
0 1 0 0
1 1 0 0
0 0 1 0
1 0 1 0
0 1 1 0
1 1 1 0
0 0 0 1
1 0 0 1
0 1 0 1
1 1 0 1
0 0 1 1
1 0 1 1
0 1 1 1
1 1 1 1
28
D
Rear
Front
29
D
30
D38 D39 D40 D41 D42 D43
D
to “0” for the TEST bit of the IC.
31
D
+10.00 dB
+11.25 dB
+12.50 dB
+13.75 dB
+15.00 dB
+16.25 dB
+17.50 dB
+18.75 dB
+1.25 dB
+2.50 dB
+3.75 dB
+5.00 dB
+6.25 dB
+7.50 dB
+8.75 dB
32
D
Input switch control (2)
33
D
0 dB
34
D
35
D
36
D
37
D
38
D
Channel selection
Output gain control
0 0
1 0
0 1
1 1
0 0
0 1
1 0
1 1
39
D
Input mute
switch control
1 s
min
40
D
0
1
+6.5 dB
+8.5 dB
Initial setting
Lch
Rch
L/R simultaneous
41
D
TEST mode
OFF
ON
0 dB
0 dB
42
D
43
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D