PM7344 datasheet(37/293 Pages) PMC

37 / 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

RDLCLK[4]

RDLCLK[3]

RDLCLK[2]

RDLCLK[1]/

Output

Receive Data Link Clock (RDLCLK). The

RDLCLK signal is available on this pin when the

internal HDLC receiver (RFDL) is disabled from

use. RDLCLK is used to process the data

stream contained on RDLSIG. When the S/UNI-

MPH is configured to receive T1-SF formatted

data, or when the T1/E1 framers are bypassed,

RDLCLK is held low. In all other formats the

rising edge of RDLCLK can be used to sample

the data on RDLSIG.

RDLEOM[4]

RDLEOM[3]

RDLEOM[2]

RDLEOM[1]

Receive Data Link End of Message (RDLEOM).

The RDLEOM signal is available on this pin

when RFDL is enabled. RDLEOM goes high

when the last byte of a received sequence is

read from the RFDL FIFO buffer, or when the

FIFO buffer is overrun.

TDLSIG[4]

TDLSIG[3]

TDLSIG[2]

TDLSIG[1]/

I/O

Transmit Data Link Signal (TDLSIG). The

TDLSIG signal is input on this pin when the

internal HDLC transmitter (XFDL) is disabled

from use. TDLSIG is the source for the data

stream to be inserted into the data link. When

the S/UNI-MPH is configured to transmit T1-ESF

formatted data, TDLSIG contains the data

stream inserted in the facility data link; when the

S/UNI-MPH is configured to transmit T1-SF

formatted data, TDLSIG is ignored; when the

S/UNI-MPH is configured to transmit E1

formatted data, TDLSIG contains the data

stream inserted in timeslot 16 or a data stream

inserted in any combination of the national bits.

TDLSIG is sampled on the rising edge of

TDLCLK.

TDLINT[4]

TDLINT[3]

TDLINT[2]

TDLINT[1]

Transmit Data Link Interrupt (TDLINT). The

TDLINT signal is output on this pin when XFDL

is enabled. TDLINT goes high when the last

data byte written to the XFDL has been set up

for transmission and processor intervention is

required to either write control information to end

the message, or to provide more data.

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