PM7344 datasheet(38/293 Pages) PMC

38 / 293 page

PM7344 S/UNI-MPH

DATA SHEET

PMC-950449

ISSUE 6

MULTI-PHY USER NETWORK INTERFACE

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

Pin Name

Type

No.

Function

TDLCLK[4]

TDLCLK[3]

TDLCLK[2]

TDLCLK[1]/

Output

Transmit Data Link Clock (TDLCLK). The

TDLCLK signal is available on this pin when the

internal HDLC transmitter (XFDL) is disabled

from use. The rising edge of TDLCLK is used to

sample the data stream contained on the

TDLSIG input. When the S/UNI-MPH is

configured to transmit T1-SF formatted data, or

when the T1/E1 framers are bypassed, TDLCLK

is held low.

TDLUDR[4]

TDLUDR[3]

TDLUDR[2]

TDLUDR[1]

Transmit Data Link Underrun (TDLUDR). The

TDLUDR signal is available on this pin when

XFDL is enabled. TDLUDR goes high when the

processor has failed to service the TDLINT

interrupt before the transmit buffer is emptied.

TCLKO[4]

TCLKO[3]

TCLKO[2]

TCLKO[1]

Output

Transmit Clock Output (TCLKO). The TDP,

TDN, and TDD outputs may be enabled to be

updated on the rising or falling edge of TCLKO.

TCLKO is the transmit clock that is adequately

jitter and wander free in absolute terms to permit

an acceptable transmission signal to be

generated. Depending on the configuration of

the S/UNI-MPH, TCLKO may be derived from

TCLKI, RCLKO, or XCLK, with or without jitter

attenuation.

TDP[4]

TDP[3]

TDP[2]

TDP[1]/

Output

Transmit Digital Positive Line Pulse (TDP). This

signal is available on the pin when the S/UNI-

MPH is configured to transmit dual-rail data.

The TDP signal can be formatted for either RZ

or NRZ waveforms, and can be enabled to be

updated on the rising or falling edge of TCLKO.

TDD[4]

TDD[3]

TDD[2]

TDD[1]

Transmit Digital Data (TDD). This signal is

available on the pin when the S/UNI-MPH is

configured to transmit single-rail data, or when

the T1/E1 framers are bypassed. The TDD

signal may be enabled to be updated on the

rising or falling edge of TCLKO.

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