ymf795 Yamatake Corporation, ymf795 Datasheet - Page 19

• Manufacturer Part Number: ymf795
• Description: Apl-2 Automobile Sound Player-2
• Manufacturer: Yamatake Corporation

YMF795
$35h Speaker volume control
$36h FM volume control
$37h Earphone output volume control
Default: 0000h
$38h Power Management control
Default: 001Eh
Index
$38h
Index
$35-7h
These bits are used to set the volume of each source. The volume setting consists of 31 steps and MUTE state, and can
be set in 1dB steps. As the MUTE is selected in the default state, cancel and use the MUTE state before sound
generation. And, be sure to power down the volume after muting it.
These bits are used to control the power-down. 1 digital line and 4 analog lines can be independently controlled. (For
details, refer to “■Power-down control division diagram”.)
Setting all bits to “1” will minimize the power of the entire LSI.
DP : Setting of “1” can power down the entire digital section.
AP1 : Setting of “1” can power down the VREF circuit in the analog section.
AP2 : Setting of “1” can power down the FM volume, speaker volume, equalizer circuit, and the non-inverted
AP3 : Setting of “1” can power down the inverted amplifier side of the speaker output section.
AP4 : Setting of “1” can power down the DAC and earphone output volume.
Relation between register setting value and volume.
b15
b15
amplifier side of speaker output section.
After initialization, the analog section (AP1 to AP4) is in the power-down state.
0
0
V[4:0]
00h
01h
02h
03h
04h
05h
06h
07h
b14
b14
0
0
Volume(dB)
b13
b13
0
MUTE
0
-30
-29
-28
-27
-26
-25
-24
b12
b12
0
0
b11
b11
V[4:0]
0
0Ah
0Bh
0Ch
0Dh
08h
09h
0Eh
0Fh
0
B10
b10
0
0
Volume(dB)
b9
-23
-22
-21
-20
-19
-18
-17
-16
b9
0
0
-19-
b8
0
b8
0
V[4:0]
10h
11h
12h
13h
14h
15h
16h
17h
b7
b7
0
0
b6
0
b6
Volume(dB)
0
-15
-14
-13
-12
-11
-10
- 9
- 8
b5
0
b5
0
AP4
b4
V 4
b4
V[4:0]
1Ah
1Dh
1Bh
1Ch
1Eh
18h
19h
1Fh
AP3
b3
V 3
b3
AP2
b2
Volume(dB)
V 2
b2
-7
-6
-5
-4
-3
-2
-1
0
AP1
b1
V 1
b1
DP
b0
V 0
b0