Si3220/Si3225
Table 28. Register and RAM Locations Used for Ringing Generation
Parameter
Register/RAM Register/RAM Bits
Mnemonic
Programmable
Range
Resolution
(LSB Size)
Ringing Waveform
RINGCON
RINGCON
RINGCON
TRAP
TAEN
TIEN
Sinusoid/Trapezoid
Enabled/Disabled
Enabled/Disabled
N/A
N/A
N/A
Ringing Active Timer Enable
Ringing Inactive Timer
Enable
Ringing Oscillator Enable
Monitor
RINGCON
RINGEN
Enabled/Disabled
0 to 8.19 s
N/A
Ringing Oscillator Active
Timer
RINGTALO/
RINGTAHI
RINGTA[15:0]
125 µs
Ringing Oscillator Inactive
Timer
RINGTILO/
RINGTIHI
RINGTI[15:0]
LF[2:0]
0 to 8.19 s
000 to 111
125 µs
Linefeed Control
LINEFEED
N/A
(Initiates Ringing State)
On-Hook Line Voltage
Ringing Voltage Offset
Ringing Frequency
VOC
VOC[15:0]
0 to 63.3 V
0 to 63.3 V
4 to 100 Hz
1.005 V (4.907 mV)
1.005 V (4.907 mV)
RINGOF
RINGOF[15:0]
RINGFRHI/
RINGFRLO
RINGFRHI[14:3]/
RINGFRLO[14:3]
Ringing Amplitude
RINGAMP
VRNGNG
RINGAMP[15:0]
VRNGNG[15:0]
0 to 160.173 V
332.04 V
628 mV (4.907 mV)
External Ringing Generator
Voltage Sense
1.302 V
(10.172 mV)
External Ringing Generator
Current Sense
IRNGNG
IRNGNG[15:0]
662.83 mA
2.6 mA (20.3 µA)
Ringing Initial Phase
Sinusoidal
RINGPHAS
RINGPHAS[15:0]
N/A
N/A
Trapezoid
0 to 1.024 s
0 to 662.83 mA
31.25 µs
External Ringing
2.6 mA (20.3 µA)
Ringing Relay Driver Enable
(Si3225 only)
RELAYCON
RDOE
Enabled/Disabled
N/A
Ringing Overhead Voltage
Ringing Speedup Timer
VOVRING
VOVRING[15:0]
0 to 63.3 V
0 to 40.96 s
1.005 V (4.907 mV)
1.25 ms
SPEEDUPR
SPEEDUPR[15:0]
Rev. 1.0
47
SILICONIMAGE [ Silicon image ]
