Data Sheet

PRELIMINARY
VS1063a Datasheet
9 FUNCTIONAL DESCRIPTION
EarSpeaker processing can be adjusted using parametric_x.earSpeakerLevel. Different levels
simulate a little different type of acoustical situation, suiting different personal preferences and
types of recording.
• 0: Best option when listening through loudspeakers or if the audio to be played contains
binaural preprocessing.
• 12000: Suited for listening to normal musical scores with headphones, very subtle.
• 38000: Suited for listening to normal musical scores with headphones, moves sound
source further away than minimal.
• 50000: Suited for old or ’dry’ recordings, or if the audio to be played is artificial.
EarSpeaker requires approximately 11 MIPS at 48 kHz samplerate.
9.6 Serial Data Interface (SDI)
The serial data interface is meant for transferring compressed data for the different decoders of
VS1063a.
If the input of the decoder is invalid or it is not received fast enough, analog outputs are auto-
matically muted.
Also several different tests may be activated through SDI as described in Chapter 10.
9.7 Serial Control Interface (SCI)
The serial control interface is compatible with the SPI bus specification. Data transfers are
always 16 bits. VS1063a is controlled by writing and reading the registers of the interface.
The main controls of the serial control interface are:
• control of the operation mode, clock, and builtin effects
• access to status information and header data
• receiving encoded data in recording mode
• uploading and controlling user programs
Version: 0.42, 2011-11-24 38