VS1002D Datasheet, PDF(28/54 Page) List of Unclassifed Manufacturers

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

VS1002D Datasheet, PDF (28/54 Pages) List of Unclassifed Manufacturers – MP3 AUDIO CODEC

◁

VLSI

Solution y

VS1002d

VS1002D

8. FUNCTIONAL DESCRIPTION

8.6.2 SCI STATUS (RW)

SCI STATUS contains information on the current status of VS1002d and lets the user shutdown the chip

without audio glitches.

Name

Bits Description

SS VER

6..4 Version

SS APDOWN2 3 Analog driver powerdown

SS APDOWN1 2 Analog internal powerdown

SS AVOL

1..0 Analog volume control

SS VER is 0 for VS1001, 1 for VS1011, 2 for VS1002 and 3 for vs1003.

SS APDOWN2 controls analog driver powerdown. Normally this bit is controlled by the system ï¬rmware.

However, if the user wants to powerdown VS1002d 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 ï¬rmware

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 ï¬rmware only.

8.6.3 SCI BASS (RW)

Name

Bits Description

SB AMPLITUDE 7..4 Enhancement in 1 dB steps (0..15)

SB FREQLIMIT 3..0 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

of the users earphones without causing clipping.

VSBE is activated when SB AMPLITUDE is set to non-zero. SB AMPLITUDE should be set to the

userâs preferences, and SB FREQLIMIT to roughly 1.5 times the lowest frequency the userâs audio

system can reproduce.

Note: Because VSBE tries to avoid clipping, it gives the best bass boost with dynamical music material,

or when the playback volume is not set to maximum.

8.6.4 SCI CLOCKF (RW)

SCI CLOCKF is used to tell if the input clock XTALI is running at something else than 24.576 MHz.

XTALI

set

kHz

steps.

Thus,

the

formula

for

calculating

the

correct

value

for

this

XT ALI

2000

(XTALI is in Hz). Values may be between 0..32767, although hardware limits the highest allowed speed.

Version 1.0, 2005-04-27

▷