PM8313 datasheet(69/192 Pages) PMC

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PM8313 D3MX

DATA SHEET

PMC-920702

ISSUE 5

M13 MULTIPLEXER

Bit

Type

Function

Default

Bit7

Unused

Bit6

Unused

Bit5

Unused

Bit4

Unused

Bit3

R/W

LINEAIS[1]

Bit2

R/W

LINEAIS[0]

Bit1

R/W

LLBE

Bit0

R/W

DLBE

The Master Loopback Configuration Register is provided at D3MX read/write

address 04H.

DLBE:

The diagnostic loopback enable (DLBE) bit allows the looping back of the

transmitted DS3 into the receive DS3 path for diagnostic purposes. If the

DLBE bit is a logic 1, the TPOS, TNEG, and TCLK signals are connected

internally to replace the signals normally input on the RPOS, RNEG, and

RCLK pins.

LLBE:

The line loopback enable (LLBE) bit allows the looping back of the received

DS3 into the transmit DS3 path. If the LLBE bit is a logic 1, the RPOS,

RNEG, and RCLK signals are connected internally to replace the signals

normally output on the TPOS, TNEG, and TCLK pins.

LINEAIS[1:0]

The line AIS (LINEAIS[1:0]) bits allow the generation of various AIS patterns

on the TDAT output when TUNI is set to logic 1, or on the TPOS and TNEG

outputs when TUNI is set to logic 0, independent of the data stream being

transmitted. The LINEAIS[1:0] option is expected to be used when the

diagnostic loopback is invoked, ensuring that only a valid DS3 stream enters

the network. The LINEAIS[1:0] bits select one of the following AIS patterns

for transmission:

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