Specifications

Si3220/25 Si3200/02
Preliminary Rev. 1.3 97
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3.32.3. Signal Generation Tools
 TIP/RING dc signal generation. The Dual ProSLIC
line feed D/A converter can program a constant
current linefeed from 18–45 mA in 0.87 mA steps
with a ±10% total accuracy. In addition, the open-
circuit TIP/RING voltage can be programmed from 0
to 63 V in 1 V steps. The linefeed circuitry can also
generate a controlled polarity reversal.
 Tone generation. The Dual ProSLIC devices can
generate single or dual tones over the entire audio
band and can direct them into either the transmit or
receive path depending on the diagnostic
requirements. Ringing signals from 4–100 Hz can
also be generated.
 Diagnostics mode ringing generation. The Dual
ProSLIC devices can generate an internal low-level
ringing signal to test for the presence of REN without
causing the terminal equipment to ring audibly. This
ringing signal can be either balanced or unbalanced
depending on the state of the RINGUNB bit of the
RINGCON register. This feature is also available
with the Si3225 provided that sufficient battery
voltage is present.
Table 52. Summary of Signal Generation and Measurement Tools
Function Range Accuracy/Resolution Comments
Signal Generation Tools
DC Current Generation 18 to 45 mA 0.875 mA
DC Voltage Generation 0 to 63.3 V 1.005 V
Audio Tone Generation 200 to 3400 Hz —
Ringing Signal Generation 4 to 15 Hz
16 to 100 Hz
±5%
±1%
Measurement Tools
8-Bit dc/Low-Frequency
Monitor A/D Converter
High Range:
0 to 160.173 V
0 to 101.09 mA
628 mV
396.4 µA
800 Hz update rate
ac
rms
, ac
PK
, and dc
post-processing blocks
Low Range: 0 to 64.07 V
0 to 50.54 mA
251 mV
198.2 µA
Programmable Timer 0 to 8.19 s 125 µs
AC Low-Pass Filter 3 to 400 Hz —
16-Bit Audio A/D Converter 0 to 2.5 V 38 µV
Transmit Path Notch Filter 300 to 3400 Hz — Single or dual notch,
90 dB attenuation
Transmit Path Bandpass Filter 300 to 3400 Hz —