SI3233 datasheet(20/100 Pages) SILABS

20 / 100 page

Si3233

Preliminary Rev. 0.5

Table 20. ProSLIC Linefeed Operations

LF[2:0]*

Linefeed State

Description

000

Open

TIP and RING tri-stated.

001

Forward Active

VTIP > VRING.

010

Forward On-Hook Transmission

VTIP > VRING; audio signal paths powered on.

011

TIP Open

TIP tri-stated, RING active; used for ground start.

100

Ringing

Ringing waveform applied to TIP and RING.

101

Reverse Active

VRING > VTIP.

110

Reverse On-Hook Transmission

VRING > VTIP; audio signal paths powered on.

111

Ring Open

RING tri-stated, TIP active.

Note:

The Linefeed register (LF) is located in direct Register 64.

Table 21. Measured Realtime Linefeed Interface Characteristics

Parameter

Measurement

Range

Resolution

Bits

Location*

Loop Voltage Sense (VTIP –

VRING)

–94.5 to +94.5 V

1.5 V

LVSP,

LVS[6:0]

Direct Register 78

Loop Current Sense

–78.75 to +78.5 mA

1.25 mA

LCSP,

LCS[5:0]

Direct Register 79

TIP Voltage Sense

0 to –95.88 V

0.376 V

VTIP[7:0]

Direct Register 80

RING Voltage Sense

0 to –95.88 V

0.376 V

VRING[7:0]

Direct Register 81

Battery Voltage Sense 1 (VBAT)

0 to –95.88 V

0.376 V

VBATS1[7:0]

Direct Register 82

Battery Voltage Sense 2 (VBAT)

0 to –95.88 V

0.376 V

VBATS2[7:0]

Direct Register 83

Transistor 1 Current Sense

0 to 81.35 mA

0.319 mA

IQ1[7:0]

Direct Register 84

Transistor 2 Current Sense

0 to 81.35 mA

0.319 mA

IQ2[7:0]

Direct Register 85

Transistor 3 Current Sense

0 to 9.59 mA

37.6 µA

IQ3[7:0]

Direct Register 86

Transistor 4 Current Sense

0 to 9.59 mA

37.6 µA

IQ4[7:0]

Direct Register 87

Transistor 5 Current Sense

0 to 80.58 mA

0.316 mA

IQ5[7:0]

Direct Register 88

Transistor 6 Current Sense

0 to 80.58 mA

0.316 mA

IQ6[7:0]

Direct Register 89

*Note:

The ProSLIC uses registers that are both directly and indirectly mapped. A “direct” register is one that is mapped

directly.

SI3233 Datasheet(PDF) 20 Page - Silicon Laboratories

SI3233 Datasheet(HTML) 20 Page - Silicon Laboratories

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