SI3000SSI-EVB Silicon Laboratories Inc, SI3000SSI-EVB Datasheet - Page 4

• Manufacturer Part Number: SI3000SSI-EVB
• Description: BOARD EVAL PARALLEL PORT SI3000
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3000SSI-EVB

• Main Purpose: Audio, CODEC
• Utilized Ic / Part: SI3000
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Si3000SSI-EVB
and 4, while the other connector is on the daughter card
(Figure 3).
interchangeable. When using the Si3000SSI-EVB in
stand-alone mode, only one of these line interfaces is
used.
When using the Si3000SSI-EVB in slave mode, one of
the line interfaces is used to connect to the phone line,
while the other line interface is used to connect to the
Master Board Modem Line Interface. This way, both the
Si3000SSI-EVB and Si3034SSI-EVB gain access to the
phone line without requiring an external phone splitter.
Handset Interface
The Si3000SSI-EVB includes a handset interface. This
interface is located on the daughter card J1 connector
pins 9 and 10.
A handset can connect directly to the phone line or the
the Si3000 device. The target system is expected to
control the DPDT relay to select the handset
connection. When the handset is connected to the
Si3000, both the Si3000 and handset are disconnected
from the phone line. In this case, the Si3000SSI-EVB
supplies DC power to the handset through an external
12 VDC bench supply. The euroblock header, J6, on the
daughter card is provided for this connection. 24.5 mA
of DC loop current is supplied to the handset.
In a voice modem application, the Si3000SSI-EVB is
configured in the slave mode, with an Si3034SSI-EVB
acting as the master board. When this system is in the
on-hook state, either the Si3034 or the handset can
respond to the phone ring and place the system in the
off-hook state.
If the system software chooses to allow the Si3034 EVB
to go off hook, the handset is excluded from the phone
loop and is connected directly to the Si3000 EVB. Voice
traffic is handled by the Si3000 and system software is
responsible for creating a virtual voice connection
between the handset and the phone system through the
Si3000 and Si3034 devices.
4
These
interfaces
are
equivalent
Preliminary Rev. 0.7
and
Microphone Interface
A standard 3.5 mm mini-phono connector located on the
daughter card connector J2 is used to provide an
interface from an external microphone to the Si3000.
The input impedance to MIC input of the Si3000 is at
least 10 k
amplification to support many input line levels.
If Jumper JP3 on the daughter card is populated, the
microphone can be powered directly from the Si3000
MBIAS output. The MBIAS output provides a typical
voltage of 2.5 volts and can supply up to 5 mA,
programmable through an external resistor. For
applications that cannot be met by the Si3000’s MBIAS
output, the jumper may be removed and an external
biasing voltage can be applied to the microphone.
Speaker Interface
A standard 3.5 mm mini-phone connector is located on
the daughter card connector J3. The Si3000 SPKRR
and SPKRL outputs are designed to drive 60
directly. To drive a 32
resistor (30
directly may result in reduced THD and Dynamic Range
performance. The maximum voltage swing is 1 Vrms for
either the left or right speaker drivers. The Si3000
speaker
attenuation.
Line Input Interface
A standard RCA jack on the daughter card connector J5
is used to provide the line-level audio inputs to the
Si3000. The Si3000 has a programmable pre-amplifier.
The input impedance of the LINEI is at least 10 k
Si3000 supports multiple levels of pre-amplification to
support various line-levels.
Line Output Interface
A standard RCA jack on the daughter card connector J4
is used to provide the line-level audio outputs from the
Si3000. The Si3000 line output gain is programmable.
The maximum output voltage is 1 Vrms.
Ω
outputs
. The Si3000 has a programmable pre-
Ω)
is needed. Driving a 32
have
Ω
headset, an external series
programmable
Ω
headset
Ω
analog
Ω
loads
. The