cxd2589q Sony Electronics, cxd2589q Datasheet - Page 57

• Manufacturer Part Number: cxd2589q
• Description: Cd Digital Signal Processor
• Manufacturer: Sony Electronics

LRCK Synchronization
Synchronization is performed at the first falling edge of the LRCK input during reset.
After that, synchronization is lost when the LRCK input frequency changes and resynchronization must be
performed.
The LRCK input frequency changes when the master clock of the LSI is switched and the playback speed
changes such as the following cases.
LRCK switching may also be performed if there are other ICs between the CD-DSP block and the DAC
block. Resynchronization must be performed in this case as well.
For resynchronization, set the LRWO command of $AX to 1, wait for one LRCK cycle or more, and then set
LRWO to 0.
SYCOF
When LRCK, PCMD and BCK are connected directly with LRCKI, PCMDI and BCKI, respectively, playback
can be performed easily in CAV-W mode by setting SYCOF of address 9 to 1.
Normally, the memory proof, etc., is used for playback in CAV-W mode.
In CAV-W mode, the LRCK output conforms not to the crystal but to the VCO. Therefore, synchronization is
frequently lost.
Setting SYCOF of address 9 to 1 ignores that the LRCKI input synchronization is lost, facilitating playback.
However, the playback is not perfect because pre-value hold or data skip occurs due to the wow flutter in the
LRCKI input.
Digital Bass Boost
Bass boost without external parts is possible using the built-in digital filter. The boost strength has two levels:
Mid. and Max. BSBST and BBSL of address A are used for the setting.
See Graph 5-2 for the digital bass boost frequency response.
When setting LRWO, set OPSL2 to 1. (See the $AX commands.)
Set SYCOF to 0 except when connecting LRCK, PCMD and BCK directly with LRCKI, PCMDI and BCKI,
respectively, and performing playback in CAV-W mode.
Set SYCOF to 0 in advance when LRCK resynchronization is applied with LRWO=1.
• When the XTSL pin switches between high and low
• When the DSPB command of $9X setting changes
• When the MCSL command of $9X setting changes
–10.00
–12.00
–14.00
10.00
–2.00
–4.00
–6.00
–8.00
8.00
6.00
4.00
2.00
0.00
10
30
Digital Bass Boost Frequency Response [Hz]
100
300
Graph 5-2.
– 57 –
1k
3k
Normal
DBB MID
DBB MAX
10k
30k
CXD2589Q