SI3201-X-FS View Datasheet(PDF) - Silicon Laboratories
Part Name
Description
Manufacturer
SI3201-X-FS
Silicon Laboratories
SI3201-X-FS Datasheet PDF : 100 Pages
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Si3233
Register 65. External Bipolar Transistor Control
Bit
D7
Name
Type
D6
SQH
R/W
D5
CBY
R/W
D4
ETBE
R/W
D3
D2
ETBO[1:0]
R/W
D1
D0
ETBA[1:0]
R/W
Reset settings = 0110_0001
Bit
Name
Function
7
Reserved Read returns zero.
6
SQH
Audio Squelch.
0 = No squelch.
1 = STIPAC and SRINGAC pins squelched.
5
CBY
Capacitor Bypass.
0 = Capacitors CP (C1) and CM (C2) in circuit.
1 = Capacitors CP (C1) and CM (C2) bypassed.
4
ETBE
External Transistor Bias Enable.
0 = Bias disabled.
1 = Bias enabled.
3:2 ETBO[1:0] External Transistor Bias Levels—On-Hook Transmission State.
DC bias current which flows through external BJTs in the on-hook transmission state.
Increasing this value increases the compliance of the ac longitudinal balance circuit.
00 = 4 mA
01 = 8 mA
10 = 12 mA
11 = Reserved
1:0 ETBA[1:0] External Transistor Bias Levels—Active Off-Hook State.
DC bias current which flows through external BJTs in the active off-hook state. Increasing
this value increases the compliance of the ac longitudinal balance circuit.
00 = 4 mA
01 = 8 mA
10 = 12 mA
11 = Reserved
64
Preliminary Rev. 0.5
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