ht82a836r Holtek Semiconductor Inc., ht82a836r Datasheet - Page 42

• Manufacturer Part Number: ht82a836r
• Description: Usb Audio Mcu
• Manufacturer: Holtek Semiconductor Inc.

The following shows the related timing of this operation:
The device contains a remote wake-up function which
can wake-up the USB Host by sending a wake-up pulse
through the RMWK bit, which is bit 1 of the USC register.
Once the USB Host receives a wake-up signal from the
device, it will send a Resume signal to the device.
USB Speaker Volume Control
The speaker output volume as well as the speaker mute/un-mute function are controlled by the USB Speaker Volume
Control USVC register. The volume range can be set between a range of 6dB to 32dB by software. The relationship
between the USVC volume control bits and the amplification or attenuation values are shown in the Volume Control Ta-
ble. The mute control will be enabled when the MUTE bit is low and both the DAC and the power amplifier will be muted.
Rev. 1.00
Result (dB)
5.5
4.5
3.5
2.5
1.5
0.5
0.5
1.5
6
5
4
3
2
1
0
1
000_1100
000_1011
000_1010
000_1001
000_1000
000_0111
000_0110
000_0101
000_0100
000_0011
000_0010
000_0001
000_0000
111_1111
111_1110
111_1101
USVC
Result (dB)
USB Speaker Volume Control Register - USVC
2.5
3.5
4.5
5.5
6.5
7.5
8.5
9.5
2
3
4
5
6
7
8
9
Speaker Volume Control Table
111_1100
111_1011
111_1010
111_1001
111_1000
111_0111
111_0110
111_0101
111_0100
111_0011
111_0010
111_0001
111_0000
110_1111
110_1110
110_1101
USVC
42
Result (dB)
The following shows the related timing:
10.5
11.5
10
11
12
13
14
15
16
17
18
19
20
21
22
23
110_1100
110_1011
110_1010
110_1001
110_1000
110_0111
110_0110
110_0101
110_0100
110_0011
110_0010
110_0001
110_0000
101_1111
101_1110
101_1101
USVC
Result (dB)
24
25
26
27
28
29
30
31
32
HT82A836R
March 20, 2008
101_1100
101_1011
101_1010
101_1001
101_1000
101_0111
101_0110
101_0101
101_0100
USVC