Specifications

Si3216
88 Rev. 1.0
Not Recommended
f
o
r N
e
w
D
e
si
g
n
s
Reset settings = 0010_0000
Reset settings = 0000_0010
Register 72. On-Hook Line Voltage
BitD7D6D5D4D3D2D1D0
Name
VSGN VOC[5:0]
Type R/W R/W
Bit Name Function
7 Reserved Read returns zero.
6 VSGN
On-Hook Line Voltage.
The value written to this bit sets the on-hook line voltage polarity (V
TIP
–V
RING
).
0=V
TIP
–V
RING
is positive.
1=V
TIP
–V
RING
is negative.
5:0 VOC[5:0]
On-Hook Line Voltage.
The value written to this register sets the on-hook line voltage (V
TIP
–V
RING
). Value may
be set between 0 V (0x00) and 94.5 V (0x3F) in 1.5 V steps. Default value = 48 V.
Register 73. Common Mode Voltage
BitD7D6D5D4D3D2D1D0
Name
VCM[5:0]
Type R/W
Bit Name Function
7:6 Reserved Read returns zero.
5:0 VCM[5:0]
Common Mode Voltage.
The value written to this register sets V
TIP
for forward active and forward on-hook trans-
mission states and V
RING
for reverse active and reverse on-hook transmission states.
The value may be set between 0 V (0x00) and –94.5 V (0x3F) in 1.5 V steps. Default
value = –3 V.