STA015 datasheet(17/44 Pages) STMICROELECTRONICS

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REQ_POL

Address: 0x0C (12)

Type: R/W

Software Reset: 0x01

Hardware Reset: 0x00

The REQ_POL registers is used to program the

polarity of the DATA_REQ line.

MSB

LSB

00000001

Default polarity (the source sends data when the

DATA_REQ line is high)

MSB

LSB

00000101

Inverted polarity (the source sends data when the

DATA_REQ line is low)

SCKL_POL

Address: 0x0D (13)

Type: R/W

Software Reset: 0x04

Hardware Reset: 0x04

MSB

LSB

XXXXX0

(1)

100

(2)

X = don’t care

SCKL_POL is used to select the working polarity

of the Input Serial Clock (SCKR).

(1) If SCKL_POL is set to 0x00, the data (SDI)

are sent with the falling edge of SCKR

and sampled on the rising edge.

(2) If SCKL_POL is set to 0x04, the data (SDI)

are sent with the rising edge of SCKR and

sampled on the falling edge.

ERROR_CODE

Address: 0x0F (15)

Type: RO

Software Reset: 0x00

Hardware Reset: 0x00

MSB

LSB

EC5

EC4

EC3

EC2

EC1

EC0

X = don’t care

ERROR_CODE register contains the last error

occourred if any. The codes can be as follows:

Code

Description

0x00

No error since the last SW or HW Reset

0x01

CRC Failure

0x02

DATA not available

0x04

Ancillary data not read

0x10

Audio synch word not found

0x2X

MPEG Header error

0x3X

MPEG Decoding errors

SOFT_RESET

Address: 0x10 (16)

Type: WO

Software Reset: 0x00

Hardware Reset: 0x00

MSB

LSB

XXXXXXX

X = don’t care; 0 = normal operation; 1 = reset

When this register is written, a soft reset occours.

The STA015 core command register and the in-

terrupt register are cleared. The decoder goes in

to idle mode.

PLAY

Address: 0x13 (19)

Type: R/W

Software Reset: 0x01

Hardware Reset: 0x01

MSB

LSB

XXXXXXX

X = don’t care; 0 = normal operation; 1 = play

The PLAY command is handled according to the

state of the decoder, as described in section 2.5.

PLAY only becomes active when the decoder is

in DECODE mode.

STA015-STA015B-STA015T

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