PM6541 datasheet(12/49 Pages) PMC

12 / 49 page

PMC-Sierra, Inc.

PM6541 E1XC-EVBD

TELECOM STANDARD PRODUCT

PMC-930917

ISSUE 1

E1XC EVALUATION DAUGHTERBOARD

C16M

J29-10

Direct access to 16.388 MHz clock driving the

MT8940. This pin is mainly provided for direct

oscillator access. If the MT8940 is not used the

16.388 MHz clock can be replaced by a 2.048 MHz

clock with access to the clock signal provided by

this pin.

C12M

J29-11

Direct access to 12.355 MHz clock driving the

MT8940. This pin is mainly provided for direct

oscillator access. If the MT8940 is not used the

12.355 MHz clock can be replaced by a 1.544 MHz

clock with access to the clock signal provided by

this pin.

GND

J29-12

MT8940 DPLL header ground reference.

3.2.3 E1XC Headers

A number of headers are provided which give direct access to the main functional

pins on the E1XCs. Both devices on the daughterboard have the same pins brought

out to headers and every effort has been made to insure that all headers are

symmetrical with both devices. The E1XCs are uniquely identified by an east/west

designation. The following table gives a brief description of the E1XC signals. For a

more detailed description of the E1XC device, refer to the E1XC datasheet.

Signal

Type

Ref (E)

Ref (W)

Description

TAP

J9-1

J10-1

Transmit Analog Positive Pulse

TAN

J9-2

J10-2

Transmit Analog Negative Pulse

RAS

J9-3

J10-3

Receive Analog Signal

REF

I/O

J9-4

J10-4

Receive Reference

GND

J9-5

J10-5

E1XC Analog Ground Reference

TCLKI

J15-1

J16-1

Transmit Clock Input

TCLKO

J15-2

J16-2

Transmit Clock Output

TDP/TDD

J15-3

J16-3

Transmit Digital Positive Line Pulse/

Transmit Digital DS-1 Signal

TDN/TFLG

J15-4

J16-4

Transmit Digital Negative Line Pulse/

Transmit FIFO Flag

TDLCLK/

TDLUDR

J15-5

J16-5

Transmit Data Link Clock/ Transmit Data

Link Underrun

TDLSIG/

TDLINT

I/O

J15-6

J16-6

Transmit Data Link Signal/ Transmit Data

Link Interrupt

GND

J15-7

J16-7

E1XC Digital Transmit Ground Reference

PM6541 Datasheet(PDF) 12 Page - PMC-Sierra, Inc

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