STA027 datasheet(30/44 Pages) STMICROELECTRONICS

30 / 44 page

5 Register description

STA027

30/44

CD00066274

Description :

After a soft reset, user must write 0 in CK_CMD to run the core clock of the chip. This will begin

the boot of the chip, and so get it out of its idle state.

5.8.3

DEC_SEL :

Address : 0x55 (85)

Type : RW - DEC

Software Reset : 0

Description :

This register select the encoder/decoder data flux according the mode written in following table

Table 18.

5.8.4

RUN :

Address : 0x56 (86)

Type : RW - DEC

Software Reset : 0

Description :

–

When a software reset occurs, register RUN is reset (value 0) by the dsp (see I).

–

When boot routines are finished, the dsp write inside RUN register the value 2 : this is

the start of the external configuration period (start of DEC : see I).

–

When the external device wants to end the external configuration period, it must write

the value 1 inside the register RUN: this is the run command that starts the decoding

process (see I).

Bit(7:0)

Mode

SINE (test mode chip alive)

SBC decoder

ADC/GPSO SBC encoder

SDI/GPSO SBC encoder

ADC/SDO SBC encoder

Note:

available modes depends on patch code used

STA027 데이터시트(PDF) 30 Page - STMicroelectronics