Datasheet

VS1053b Datasheet
9 FUNCTIONAL DESCRIPTION
• normal: Suited for listening to normal musical scores with headphones, moves sound
source further away than minimal.
• extreme: Suited for old or ’dry’ recordings, or if the audio to be played is artificial, for
example generated MIDI.
9.4 Serial Data Interface (SDI)
The serial data interface is meant for transferring compressed data for the different decoders of
VS1053b.
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.
9.5 Serial Control Interface (SCI)
The serial control interface is compatible with the SPI bus specification. Data transfers are
always 16 bits. VS1053b 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: 1.22, 2014-12-19 36