Si3050 datasheet(82/128 Pages) SILABS

82 / 128 page

Si3050 + Si3011/18/19

Rev. 1.5

Reset settings = 0000_0000

Bit

D7D6D5D4D3D2D1

Name

DCV[1:0]

MINI[1:0]

ILIM

DCR

Type

R/W

Bit

Name

Function

7:6

DCV[1:0] TIP/RING Voltage Adjust. Si3018 and Si3019 line-side only.

These bits adjust the voltage on the DCT pin of the line-side device, which affects the TIP/

RING voltage on the line. Low-voltage countries should use a lower TIP/RING voltage. Rais-

ing the TIP/RING voltage can improve signal headroom.

DCV[1:0]

DCT Pin Voltage

3.1 V

3.2 V

3.35 V

3.5 V

For Si3011 line-side device, the only valid setting for DCV[1:0] is 10.

5:4

MINI[1:0] Minimum Operational Loop Current. Si3018 and Si3019 line-side only.

Adjusts the minimum loop current at which the DAA can operate. Increasing the minimum

operational loop current can improve signal headroom at a lower TIP/RING voltage.

MINI[1:0]

Min Loop Current

10 mA

12 mA

14 mA

16 mA

For Si3011 line-side device, the only valid setting for MINI[1:0] is 00.

3:2

Reserved These bits must always be written to 0.

ILIM

Current Limiting Enable.

0 = Current limiting mode disabled.

1 = Current limiting mode enabled. This mode limits loop current to a maximum of 60 mA per

the TBR21 standard.

DCR

DC Impedance Selection.

0=50  dc termination is selected. This mode should be used for all standard applications.

1 = 800  dc termination is selected.

Si3050 Datasheet(PDF) 82 Page - Silicon Laboratories

Si3050 Datasheet(HTML) 82 Page - Silicon Laboratories

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