UPD9903 Datasheet, PDF (14/28 Pages) NEC – UPD9903 ANALOG SUBSCRIBER LINE LSI DIGITAL CODEC

(2) SCN data transmission timing (HWX pin)
(a) DCLK is later than FS
tF
tWLS
FS
tCSD2
tCY
tR
tDCLK
tF
DCLK
1
2
Hi-Z
HWX
(SCN data)
Hi-Z
TYPE
tDZX2
tDZX2
tDCLK
tDDX
MSB
2nd
Hi-Level
(b) FS is later than DCLK
FS
tCSD1
tWHSC
DCLK
1
2
µPD9903
tR
8
tHZX
7th
LSB
tHZX
Hi-Z
8
tDZX1
Hi-Z
HWX
(SCN data)
TYPE
Hi-Z
tDZX1
MSB
2nd
Hi-Level
7th
LSB
Hi-Z
14