zxcw8100s28 ETC-unknow, zxcw8100s28 Datasheet - Page 17

• Manufacturer Part Number: zxcw8100s28
• Description: 32 Bit Stereo Direct Drive Digital Audio Amplifier
• Manufacturer: ETC-unknow

SPI REGISTER DETAILED DESCRIPTION
Volume
The volume register increments digitally in 0.5dB
steps. The volume range is from -94.5db to +25dB. The
final used code in the sequence it termed a soft mute
and sets the volume to -95dB. The code sequence
applies equally to left and right volume controls. The
bit numbers for the volume controls are 0 to 8 for the
left channel and 9 to 17 for the right.
The control of the volume should not jump directly
from one level to the next but should pass through all
0.5dB steps between the two required levels.
Code examples in the sequence follow:
Bass
The bass register increments digitally in steps of 1dB.
The range is from 0dB to
whether the bass control is set to cut or boost (bit18).
The bit numbers for the bass level control are 19to 22.
Bit18: boost=1, cut=0
Code examples in the sequence follow:
The bass corner frequency is selected by bits 23and 24.
ISSUE 3 - NOVEMBER 2003
100110000
100101111
100101110
011111111
011111110
011111101
011111010
(default and start up)
001000010
001000001
001000000
(-95dB is the soft mute)
0000
0001
1110
1111
00
01
10
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
+/-15dB depending on
25dB
24.5dB
24dB
0.5dB
0dB
-0.5dB
-2dB
-94dB
-94.5dB
-95dB
+/-0dB
+/-1dB
+/-14dB
+/-15dB
100Hz
200Hz
50Hz
17
Treble
The treble register increments digitally in steps of 1dB.
The range is from 0dB to
whether the treble control is set to cut or boost (bit25).
The bit numbers for the treble level control are 26to 29.
Bit25: boost=1, cut=0
Code examples in the sequence follow:
The treble corner frequency is selected by bits 30& 31.
50/15 s Standard De-emphasis
The ZXCW8100 incorporates a standard 50/15 s digital
de-emphasis filter. De-emphasis is applicable in single
speed mode only.
Bits 32and 33match to sampling frequencies asbelow:
0000
0001
1110
1111
00
01
10
00
01
10
11
=
=
=
=
=
=
=
=
=
=
=
ZXCW8100S28
+/-0dB
+/-1dB
+/-14dB
+/-15dB
4kHz
12kHz
no de-emphasis
44.1kHz
32kHz
48kHz
8kHz
+/-15dB depending on
S E M I C O N D U C T O R S