PM7346 datasheet(115/419 Pages) PMC

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PM7346 S/UNI-QJET

DATASHEET

PMC-960835

ISSUE 6

SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3

PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 94

Bit

Type

Function

Default

Bit 7

R/W

TFRM[1]

Bit 6

R/W

TFRM[0]

Bit 5

R/W

TXREF

Bit 4

R/W

TICLK

Bit 3

R/W

TUNI

Bit 2

R/W

TCLKINV

Bit 1

R/W

TPOSINV

Bit 0

R/W

TNEGINV

TNEGINV:

The TNEGINV bit provides polarity control for outputs TNEG/TOHM. When a

logic 0 is written to TNEGINV, the TNEG/TOHM output is not inverted. When

a logic 1 is written to TNEGINV, the TNEG/TOHM output is inverted. The

TNEGINV bit setting does not affect the loopback data in diagnostic loopback.

TPOSINV:

The TPOSINV bit provides polarity control for outputs TPOS/TDATO. When a

logic 0 is written to TPOSINV , the TPOS/TDATO output is not inverted. When

a logic 1 is written to TPOSINV , the TPOS/TDATO output is inverted. The

TPOSINV bit setting does not affect the loopback data in diagnostic loopback.

TCLKINV:

The TCLKINV bit provides polarity control for output TCLK. When a logic 0 is

written to TCLKINV, TCLK is not inverted and outputs TPOS/TDATO and

TNEG/TOHM are updated on the falling edge of TCLK. When a logic 1 is

written to TCLKINV, TCLK is inverted and outputs TPOS/TDATO and

TNEG/TOHM are updated on the rising edge of TCLK.

TUNI:

The TUNI bit enables the S/UNI-QJET to transmit unipolar or bipolar DS3, E3,

or J2 data streams. When a logic 1 is written to TUNI, the S/UNI-QJET

transmits unipolar DS3, E3, or J2 data on TDATO. When TUNI is logic 1, the

TOHM output indicates the start of the DS3 M-Frame (the X1 bit), the start of

the E3 frame (bit 1 of the frame), or the first framing bit of the J2 multiframe.

PM7346 Datasheet(PDF) 115 Page - PMC-Sierra, Inc

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