si3210 ETC-unknow, si3210 Datasheet - Page 21

• Manufacturer Part Number: si3210
• Description: Proslic Programmable Cmos Slic/codec With Ringing/battery Voltage Generation
• Manufacturer: ETC-unknow

Functional Description
The ProSLIC™ is a single low-voltage CMOS device
that provides all the SLIC, codec, DTMF detection, and
signal generation functions needed for a complete
analog telephone interface. The ProSLIC performs all
battery, overvoltage, ringing, supervision, codec, hybrid,
and test (BORSCHT) functions. Unlike most monolithic
SLICs, the Si3210 does not require externally supplied
high-voltage battery supplies. Instead, it generates all
necessary battery voltages from a positive dc supply
using its own dc-dc converter controller. Two fully
programmable tone generators can produce DTMF
tones, phase continuous FSK (caller ID) signaling, and
call progress tones. DTMF decoding and pulse metering
signal generation are also integrated.
The ProSLIC is ideal for short loop applications, such as
terminal adapters, cable telephony, PBX/key systems,
wireless local loop (WLL), and voice over IP solutions.
The device meets all relevant LSSGR and CCITT
standards.
The linefeed provides programmable on-hook voltage,
programmable off-hook loop current, reverse battery
operation, loop or ground start operation, and on-hook
transmission ringing voltage. Loop current and voltage
are continuously monitored using an integrated A/D
converter. Balanced 5 REN ringing with or without a
programmable dc offset is integrated. The available
offset, frequency, waveshape, and cadence options are
designed to ring the widest variety of terminal devices
and to reduce external controller requirements.
A complete audio transmit and receive path is
integrated, including DTMF decoding, ac impedance,
and
programmable, allowing for a single hardware design to
meet international requirements. Digital voice data
transfer occurs over a standard PCM bus. Control data
is transferred using a standard SPI. The device is
available in a 38-pin TSSOP.
Linefeed Interface
The ProSLIC’s linefeed interface offers a rich set of
features and programmable flexibility to meet the
broadest applications requirements. The dc linefeed
characteristics are software programmable; key current,
voltage, and power measurements are acquired in
realtime and provided in software registers.
DC Feed Characteristics
The ProSLIC has programmable constant voltage and
constant current zones as depicted in Figure 14. Open
circuit TIP-to-RING voltage (V
voltage zone and is programmable from 0 V to 94.5 V in
hybrid
gain.
These
OC
features
) defines the constant
are
Preliminary Rev. 1.11
software
1.5 V steps. The loop current limit (I
constant current zone and is programmable from 20 mA
to 41 mA in 3 mA steps. The ProSLIC has an inherent
dc output resistance (R
The TIP-to-RING voltage (V
a programmable voltage (V
headroom to the positive-most terminal (TIP in forward
polarity states and RING in reverse polarity states) for
carrying audio signals. Table 20 summarizes the
parameters to be initialized before entering an active
state.
*Note: The ProSLIC uses registers that are both directly
Parameter
V
V
V
I
Figure 14. Simplified DC Current/Voltage
LIM
(TIP-RING )
OC
CM
Table 20. Programmable Ranges of DC
Si3210/Si3211/Si3212
and indirectly mapped. A “direct” register is one that
is mapped directly.
V
Programmable
O C
(V)
Linefeed Characteristics
20 to 41 mA
0 to 94.5 V
0 to 94.5 V
Linefeed Characteristic
Range
R
Constant
Voltage
O
O
Zone
=160
) of 160 .
Default
20 mA
Value
OC
48 V
3 V
CM
) is offset from ground by
I
LIM
) to provide voltage
Constant Current
Register
VOC[5:0]
VCM[5:0]
ILIM[2:0]
Bits
LIM
I
LO O P
) defines the
Zone
(m A)
Register 71
Register 72
Register 73
Location*
Direct
Direct
Direct
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