UPD9903 Datasheet, PDF (16/28 Pages) NEC – UPD9903 ANALOG SUBSCRIBER LINE LSI DIGITAL CODEC

(4) CTL data reception timing (HWR pin)
(a) DCLK is later than FS
tF
tWLS
FS
tCSD2
DCLK
HWR
(CTL data)
Note
tCY
tR
tDCLK
tF
1
2
tDSR
tDCLK
tDHR
tR, tF
MSB Note 2nd
Note Don’t care
(b) FS is later than DCLK
8
7th
Note
8th
FS
tCSD1
tWHSC
DCLK
1
2
8
µPD9903
tR
9
Note
16