PM7346 datasheet(44/419 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 23

Pin Name

Type

Pin No.

Function

TCLK[4]

TCLK[3]

TCLK[2]

TCLK[1]

Output

Transmit Output Clock (TCLK[4:1]).

TCLK[4:1] provides the transmit direction

timing. TCLK[4:1] is a buffered version of

TICLK[4:1] and can be enabled to update

the TPOS/TDATO[4:1] and

TNEG/TOHM[4:1] outputs on its rising or

falling edge.

RPOS[4]

RPOS[3]

RPOS[2]

RPOS[1]

Input

Receive Digital Positive Pulse

(RPOS[4:1]). RPOS[4:1] contains the

positive pulses received on the B3ZS-

encoded DS3, the HDB3-encoded E3, or

the B8ZS-encoded J2 transmission

system when the dual-rail NRZ input

format is selected.

RDATI[4]

RDATI[3]

RDATI[2]

RDATI[1]

Receive Data (RDATI[4:1]). RDATI[4:1]

contains the data stream when the single-

rail (unipolar) NRZ input format is enabled

or when a non-DS3/E3/J2 based

transmission system is being processed

(for example RDATI may contain a DS1 or

E1 stream).

The RPOS/RDATI[4:1] pin function

selection is controlled by the RFRM[1:0]

bits in the S/UNI-QJET Configuration

Registers and by the UNI bits in the DS3

FRMR, the E3 FRMR, or the J2 FRMR

Configuration Registers. Both RPOS[4:1]

and RDATI[4:1] are sampled on the rising

edge of RCLK[4:1] by default, and may be

enabled to be sampled on the falling edge

of RCLK[4:1]. This sampling is controlled

by the RCLKINV bit in the S/UNI-QJET

Receive Configuration Registers. In

addition, signal polarity control is provided

by the RPOSINV bit in the S/UNI-QJET

Receive Configuration Registers.

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