VS1103B Datasheet, PDF (31/61 Pages) List of Unclassifed Manufacturers – MIDI/ADPCM AUDIO CODEC

VLSI
Solution ^y
VS1103b
VS1103B
6. FUNCTIONAL DESCRIPTION
Bits in SM EARSPEAKER control EarSpeaker spatial processing. They are used as follows:
SM EARSPEAKER Setting
0
Off
1
Minimal
2
Normal
3
Extreme
EarSpeaker uses approximately 6 MIPS at 44.1 kHz sample rate.
SM LINE IN is used to select the input for ADPCM recording. If ’0’, microphone input pins MICP and
MICN are used; if ’1’, LINEIN is used.
When SM ADPCM is turned on, ADPCM encoding is activated (see Image 12 at Page 26).
6.6.2 SCI STATUS (RW)
SCI STATUS contains information on the current status of VS1103b and lets the user shutdown the chip
without audio glitches.
Name
Bits Description
SS VER
SS APDOWN2
SS APDOWN1
SS AVOL
7:4 Version
3 Analog driver powerdown
2 Analog internal powerdown
1:0 Analog volume control
SS VER is 0 for VS1001, 1 for VS1011, 2 for VS1002, 3 for VS1003, 4 for VS1053, 5 for VS1033, and
7 for VS1103.
SS APDOWN2 controls analog driver powerdown. Normally this bit is controlled by the system firmware.
However, if the user wants to powerdown VS1103b with a minimum power-off transient, turn this bit to
1, then wait for at least a few milliseconds before activating reset.
SS APDOWN1 controls internal analog powerdown. This bit is meant to be used by the system firmware
only.
SS AVOL is the analog volume control: 0 = -0 dB, 1 = -6 dB, 3 = -12 dB. This register is meant to be
used automatically by the system firmware only.
6.6.3 SCI BASS (RW)
Name
ST AMPLITUDE
ST FREQLIMIT
SB AMPLITUDE
SB FREQLIMIT
Bits
15:12
11:8
7:4
3:0
Description
Treble Control in 1.5 dB steps (-8..7, 0 = off)
Lower limit frequency in 1000 Hz steps (0..15)
Bass Enhancement in 1 dB steps (0..15, 0 = off)
Lower limit frequency in 10 Hz steps (2..15)
The Bass Enhancer VSBE is a powerful bass boosting DSP algorithm, which tries to take the most out
Version 1.01, 2007-09-03
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