SI2438FT18-EVB Silicon Laboratories Inc, SI2438FT18-EVB Datasheet - Page 74
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SI2438FT18-EVB
Manufacturer Part Number
SI2438FT18-EVB
Description
BOARD EVAL SI2438+SI3018 24PIN
Manufacturer
Silicon Laboratories Inc
Datasheet
1.SI3050-E-FM.pdf
(128 pages)
Specifications of SI2438FT18-EVB
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Si3050 + Si3011/18/19
Register 16. International Control 1
Reset settings = 0000_0000
74
3:2
Bit
7
6
5
4
1
0
Name
Type
Bit
Reserved These bits may be written to a zero or one.
Reserved These bits may be written to a zero or one.
Reserved
Name
OHS
IIRE
RZ
RT
D7
On-Hook Speed. Si3018 and Si3019 line-side only.
This bit, in combination with the OHS2 bit (Register 31) and the SQ[1:0] bits (Register 59), sets
the amount of time for the line-side device to go on-hook. The on-hook speeds specified are
measured from the time the OH bit is cleared until loop current equals zero.
OHS
For Si3011 line-side device, this bit may be written to a zero or one.
IIR Filter Enable.
0 = FIR filter enabled for transmit and receive filters. (See Figures 7–10 on page 15.)
1 = IIR filter enabled for transmit and receive filters. (See Figures 11–16 on page 16.)
Ringer Impedance. Si3018 and Si3019 line-side only.
0 = Maximum (high) ringer impedance.
1 = Synthesized ringer impedance used to satisfy a maximum ringer impedance specification
in countries, such as Poland, South Africa, and Slovenia.
For Si3011 line-side device, this bit may be written to a zero or one.
Ringer Threshold Select. Si3018 and Si3019 line-side only.
This bit, in combination with the RT2 bit, is used to satisfy country requirements on ring detec-
tion. Signals below the lower level do not generate a ring detection; signals above the upper
level are guaranteed to generate a ring detection.
RT
0
0
1
1
For Si3011 line-side device, this bit may be written to a zero or one.
Read returns zero.
0
0
1
OHS
R/W
RT2
OHS2
D6
0
1
0
1
X
0
1
SQ[1:0]
D5
00
00
11
RT Lower level
13.5 V
Reserved, do not use this setting.
19.35 V
40.5 V
rms
rms
rms
Mean On-Hook Speed
26 ms ±10% (meets Australia spark quenching spec)
Less than 0.5 ms
3 ms ±10% (meets ETSI standard)
Rev. 1.4
IIRE
R/W
D4
Function
RT Upper level
16.5 V
23.65 V
49.5 V
D3
rms
RMS
RMS
D2
R/W
RZ
D1
R/W
D0
RT
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