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参数资料
| 型号： | YMU757B-QZ |
| 元件分类： | 音频合成 |
| 英文描述： | TONE/MUSIC SYNTHESIZER, PQCC20 |
| 封装： | LEAD FREE, QFN-20 |
| 文件页数： | 11/43页 |
| 文件大小： | 990K |
| 代理商： | YMU757B-QZ |
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YMU757B
-19-
$35h
Speaker volume control
$36h
FM volume control
$37h
Ear phone output volume control
Default: 0000h
Index
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
$35-7h
0
V4
V3
V2
V1
V0
These bits are used to set the volume of each source. The volume setting consists of 31 steps and mute function. It is
possible to set at 1dB intervals. As the default is muted, cancel the mute function before proceeding to sound generation.
Also, to reduce the power, be sure to mute the volume subject to power reduction before shifting.
Relations of register setting value and volume.
V[4:0]
Volume(dB)
V[4:0]
Volume(dB)
V[4:0]
Volume(dB)
V[4:0]
Volume(dB)
00h
MUTE
08h
-23
10h
-15
18h
-7
01h
-30
09h
-22
11h
-14
19h
-6
02h
-29
0Ah
-21
12h
-13
1Ah
-5
03h
-28
0Bh
-20
13h
-12
1Bh
-4
04h
-27
0Ch
-19
14h
-11
1Ch
-3
05h
-26
0Dh
-18
15h
-10
1Dh
-2
06h
-25
0Eh
-17
16h
- 9
1Eh
-1
07h
-24
0Fh
-16
17h
- 8
1Fh
0
$38h
Power Management control
Default: 001Eh
Index
b15
b14
b13
b12
b11
B10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
$38h
0
AP4
AP3
AP2
AP1
DP
This setting is used to reduce the power of each function. It is possible to control 1 digital system and 4 analog systems
independently. (For the details, please refer to "Power-down control division diagram".)
Setting all bits to "1" will minimize the power of the entire LSI.
DP : Use of "1" for this setting will reduce the power of the entire digital section.
AP1 : Use of "1" for this setting will reduce the power of the VREF circuit in the analog section.
AP2 : Use of "1" for this setting will reduce the power on the non-inverted amplifier side of the FM volume, speaker
volume, equalizer circuit and speaker output section.
AP3 : Use of "1" for this setting will reduce the power of the inverted amplifier side of the speaker output section.
AP4 : Use of "1" for this setting will reduce the power of the DAC and ear phone output volume.
After initialization, the power of the analog section (AP1 to AP4) is reduced.
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