PT8401 datasheet(16/28 Pages) PTC

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MP3 Audio Decoder

PT8401

PT8401 v 1.3

Page 16

Updated March 2002

Princeton Technology Corp.

0x46

Set_SAO

Bit 5:4

00 : ACQO is generated from the Internal Clock.

01 : ACQO is generated from the External Clock.

10 : MCLKO is generated from the External Clock.

0x0

R/W

Second Serial Input Port Mode Setting

Bit 0

0 : ALRQ Signal. Left is "Low".

1 : ALRQ Signal. Left is "High".

0x47

Set_SAI2

Bit 1

0 : Relative Timing No Delay to ALRQ.

1 : Relative Timing One Delay to ALRQ.

0x0

R/W

0x59

ADPCM_FS_SE

ADPCM Decoding Mode Sampling Frequency Selection.

0 : 11.025kHz.

1 : 12kHz.

2 : 8kHz

0x0

R/W

0x5a

Soft_Reset

Set to 1 to software reset, but all the command registers keep the

setting values.

0x0

0x5e

Pwr_Dwn_Reg

Power Down Control Register.

0x0

0x63

Fward_Num

Fast Foward Mode, number of frame to be play

0x6

0x64

Skip_Num

Fast Foward Mode, number of frame to be skip

0x6

PLL SETTING COMMAND

Address Register Name

Description

Default

R/W

0x48

MclkSel

Master Oversampling Output Clock Selection.

“0” : 256fs.

“1” : 384fs.

0x0

R/W

0x4b

PllSet

PLL Control Parameter Setting.

0x3b28

R/W

0x4c

PllFraction

15-bit PLL Fraction Parameter Setting.

0x7e5e

R/W

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