PM6344 datasheet(227/256 Pages) PMC

227 / 256 page

STANDARD PRODUCT

PMC-Sierra, Inc.

PM6344 EQUAD

PMC-951013

ISSUE 5

QUADRUPLE E1 FRAMER

214

The method of accessing the indirect registers within the SIGX functional

block is the same as that explained in the EQUAD databook section entitled

"Using the Per-Channel Serial Controllers."

The SIGX should be configured as follows:

a) Set the IND bit in quadrant 1 register 040H (0C0H, 140H or 1C0H for

quadrants 2, 3 or 4) to a logic one. This will enable accesses to the SIGX

indirect registers.

b) Program the SIGX indirect registers such that, for timeslots 1-15 and 17-

31 the per-timeslot Configuration and Signaling Trunk Conditioning data

registers contain 10H. This will configure the SIGX to debounce the

received signaling states as explained in the RDEBE bit description.

c) Set the PCCE bit in register 040H (0C0H, 140H, 1C0H) to a logic one.

This will enable the SIGX to perform the functions configured in step (b)

above.

5) Configure for Diagnostic Digital Loopback. To accomplish this:

a) Program quadrant 1 Register 00AH (08AH, 10AH or 18AH for quadrants

2, 3 or 4) to 04H. This will enable the Diagnostic Digital Loopback mode of

the EQUAD which internally loops back the transmit data to the receive

circuitry. This mode is sometimes called a "local" loopback.

b) Program Register 10H (090H, 110H, 190H) to default value of 00H and

to accept the HDB3-encoded signal sourced by the transmitter.

6) Disable Elastic Store.

This can be done by bypassing elastic store. To do this, program Register

00H (080H, 100H, 180H) to a value of 20H.

7) Wait until the FRMR functional block is solidly in-frame.

This can be determined by polling the OOF, OOSMF and OOCMF bits in

bits in Register 024H (0A4H, 124H, 1A4H). When the OOF, OOSMF and

OOCMF bits are low (logic zero) for two consecutive polls, and the OOFI,

OOSMFI and OOCMFI bits are low (logic zero) on the second consecutive

poll, then you can assume that the FRMR functional block of the current

quadrant of the EQUAD has found a stable frame alignment pattern.

PM6344 Datasheet(PDF) 227 Page - PMC-Sierra, Inc