UPD9903 Datasheet, PDF (3/28 Pages) NEC – UPD9903 ANALOG SUBSCRIBER LINE LSI DIGITAL CODEC

µPD9903
BLOCK DIAGRAM
RC1
RC2
RC3
DCIN1
ASCN
AGDT
DCIN2
DCIN3
AIN
DCOUT1
DCOUT2
COMP.
COMP.
A/D
Feed control
+
HZ
HB
COMP.
SUS
GDT
Waveform shaping
guard processing
SCN
Channel
filter
Linear to
A or m
+
BSY
SUS
HWX
AOUT
ACOMIN
ACOMOUT
BBIN
BCUT
ALM
PD
D/A
Reference
voltage
Controller
+
Channel
filter
Ring-Trip
A or µ to
linear
Timing
HWR
TYPE
FS
DCLK
3