Philips CD721 - Page 29

3-6
Serial data interface
SAA7345 can be used in the CD-ROM mode, in fs (= no Also the DAC output format can be programmed
oversampling), in 2 fs or in 4fs (= 4 times oversampled) (Japanese 16 or 18 bit or Philips 16 bit).~
mode by programming the corresponding register. There are 10 possible DAC output formats :
FREQ. Mhz POLATIONS
a SE TP
es a Te
Bae ese ea
esr EC |
Sa a Oa eT
ae
eer |
ee nee ee
ee ee
Mode 3 is used in CD750 with NPC filter SM5840A and Mode 5 is used in CD710/720 with CC-DAC TDA1545.
-BSDAC SAA7350. For description of NPC filter and BS
DAC we refer to Circuit Description CD93 part II Mode 6 is used in CD740 and CD911/921 with BCC-DAC
orderno. 4822 725 24042 TDA1549.
SCLK
DATA
LEFT CHANNEL DATA(WCLK NORMAL POLARITY)
WCLK
Misc ESV SV
CD-ROM
MODE ONLY
Fig. A Philips I2S data format(16-bit word length shown)
SCLK SiN vce n a eg aes et goad arp eg sina ieee cr ae er
DATA a 2 DS |
LEFT CHANNEL DATA
WCLK
SS
a
:
MISC ee ee :
Fig. B Japanese data format(18-bit word length shown)
HAS1153
PCS 60 962