ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 355 -
Revision 2.4
DAC Volume Control Value (VOLCTRL_DPWMVAL)
Register
Offset
R/W Description
Reset Value
VOLCTRL_DPWMVAL
VOL0x08
R/W DPWM Volume Control Value
0x0004_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
VALUE
15
14
13
12
11
10
9
8
VALUE
7
6
5
4
3
2
1
0
VALUE
Bits
Description
[31:24]
Reserved
[23:0]
VALUE
DPWM Audio Signal Volume Control Value
Format <6,18>. Gain range from 108.3dB to 36.1dB
0x00_0001 ---- -108.3dB
…
0x40_0000 ---- 0dB (default)
…
0xFF_FFFF ---- 36.1dB
Volume db = 20*log10(VALUE)