User Manual

VS1003

8 FUNCTIONAL DESCRIPTION

8.6.9 SCI_HDAT0 and SCI_HDAT1 (R)

For WAV ﬁles, SCI_HDAT0 and SCI_HDAT1 read as 0x7761, and 0x7665, respectively.

For WMA ﬁles, SCI_HDAT1 contains 0x574D and SCI_HDAT0 contains the data speed mea-

sured in bytes per second. To get the bit-rate of the ﬁle, multiply the value of SCI_HDAT0 by

for MIDI ﬁles, SCI_HDAT1 contains 0x4D54 and SCI_HDAT0 contains values according to the

following table:

HDAT0[15:8] HDAT0[7:0] Value Explanation

0 polyphony current polyphony

1..255 reserved

For MP3 ﬁles, SCI_HDAT[0. . . 1] have the following content:

Bit Function Value Explanation

HDAT1[15:5] syncword 2047 stream valid

HDAT1[4:3] ID 3 ISO 11172-3 MPG 1.0

2 ISO 13818-3 MPG 2.0 (1/2-rate)

1 MPG 2.5 (1/4-rate)

0 MPG 2.5 (1/4-rate)

HDAT1[2:1] layer 3 I

2 II

1 III

0 reserved

HDAT1[0] protect bit 1 No CRC

0 CRC protected

HDAT0[15:12] bitrate ISO 11172-3

HDAT0[11:10] sample rate 3 reserved

2 32/16/ 8 kHz

1 48/24/12 kHz

0 44/22/11 kHz

HDAT0[9] pad bit 1 additional slot

0 normal frame

HDAT0[8] private bit not deﬁned

HDAT0[7:6] mode 3 mono

2 dual channel

1 joint stereo

0 stereo

HDAT0[5:4] extension ISO 11172-3

HDAT0[3] copyright 1 copyrighted

0 free

HDAT0[2] original 1 original

0 copy

HDAT0[1:0] emphasis 3 CCITT J.17

2 reserved

1 50/15 microsec

0 none

Version: 1.08, 2014-12-19 34