SI3211 ETC, SI3211 Datasheet - Page 23

• Manufacturer Part Number: SI3211
• Description: PROSLIC PROGRAMMABLE CMOS SLIC/CODEC WITH RINGING/BATTERY VOLTAGE GENERATION
• Manufacturer: ETC

Note: The Linefeed register (LF) is located in direct Register 64.
LF[2:0]*
Figure 15. Simplified ProSLIC Linefeed Architecture for TIP and RING Leads (One Shown)
000
001
010
100
101
011
110
111
TIP or
RING
C
R
AC
AC
Reverse On-Hook Transmission
Forward On-Hook Transmission
Control
AC Sense
AC
Linefeed State
Forward Active
Reverse Active
Ring Open
TIP Open
Control
Ringing
Loop
Open
AC
Codec
Aud io
A/D
D/A
Table 21. ProSLIC Linefeed Operations
R
BP
Preliminary Rev. 1.11
DSP
Q
Q
N
P
R
E
Q
TIP and RING tri-stated.
V
V
TIP tri-stated, RING active; used for ground start.
Ringing waveform applied to TIP and RING.
V
V
RING tri-stated, TIP active.
DN
TIP
TIP
RING
RING
> V
> V
> V
> V
RING
RING
Si3210/Si3211/Si3212
TIP
TIP
M onitor A/D
SLIC DAC
.
Control
.
; audio signal paths powered on.
; audio signal paths powered on.
A/D
D/A
Loop
DC
DC Sense
Description
Control
R
DC
DC
R
SE
Em itter Sense
Battery Sense
R
BAT
V
B AT
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