AK4584_01 Datasheet, PDF (28/53 Pages) Asahi Kasei Microsystems – 24Bit 96kHz Audio CODEC with DIT/DIR

ASAHI KASEI
[AK4584]
PDN pin = "L" to "H"
Read 0EH
Initialize
Release
Muting
INT0/1 pin = "H"
No
Yes
Mute DAC Output
Read 0EH
Each Error Handling
No
INT0/1 pin = "H"
Yes
Figure 9. Error Handling Sequence Example
„ Non-PCM (AC-3, MPEG, etc.) and DTS-CD Bitstream Detection
The AK4584 has a Non-PCM steam auto-detect function. When the 32-bit mode Non-PCM preamble based on Dolby’s
“AC-3 Data Stream in IEC60958 Interface” is detected, the AUTO bit goes to “1”. The 96-bit sync code consists of
0x0000, 0x0000, 0x0000, 0x0000, 0xF872 and 0x4E1F. Detection of this pattern will set the AUTO to “1”. Once the
AUTO is set “1”, it will remain “1” until 4096 frames pass through the chip without an additional sync pattern being
detected. When those preambles are detected, the burst preambles Pc and Pd that follow the sync codes are stored to
registers. The AK4584 also has DTS-CD bit stream auto-detection. When the AK4584 detects DTS-CD bit streams, the
DTSCD bit goes to “1”. If the next sync code does not appear within 4096 flames, the DTSCD bit goes to “0” until when
the AK4584 detects the stream again.
MS0118-E-00
- 28 -
2001/11