PM7347 datasheet(40/341 Pages) PMC

40 / 341 page

S/UNI®-JET Data Sheet

Released

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

Document ID: PMC-1990267, Issue 3

Pin Name

Type

No.

Function

TCELL

The Transmit Cell Indication (TCELL) is valid when the

TCELL bit in the S/UNI-JET Miscellaneous Register is

set.

TCELL pulses once for every cell (idle or assigned)

transmitted. TCELL is updated using timing derived from

the transmit input clock (TICLK), and is active for a

minimum of 8 TICLK periods (or 8 RCLK periods if loop-

timed).

TPOHCLK

Output

U13

The Transmit PLCP Overhead Clock (TPOHCLK) is

active when PLCP processing is enabled. TPOHCLK is

nominally a 26.7 kHz clock for a DS1 PLCP frame, a 768

kHz clock for a DS3 PLCP frame, a 33.7 kHz clock for an

E1 based PLCP frame, and a 576 kHz clock for an G.751

E3 based PLCP frame.

TPOHFP is updated on the falling edge of TPOHCLK.

TPOH and TPOHINS are sampled on the rising edge of

TPOHCLK.

TIOHM

TFPI

TMFPI

Input

W15

The Transmit Input Overhead Mask (TIOHM) is valid only

if the FRMRONLY bit in the S/UNI-JET Configuration 1

overhead bits when not configured for DS1, DS3, E1, E3,

or J2 transmission system streams. TIOHM is delayed

internally to produce the TOHM output.

When configured for operation over a DS1, a DS3, an

E1, an E3, or a J2 transmission system sublayer, TIOHM

is not required, and should be set to logic zero. When

configured for other transmission systems, TIOHM is set

to logic one for each overhead bit position. TIOHM is set

to logic zero if the transmission system does not contain

overhead bits.

TIOHM is sampled on the rising edge of TICLK.

The Framer Transmit Frame Pulse/Multiframe Pulse

(TFPI/TMFPI) is valid when the S/UNI-JET is configured

as a DS3, E3, or J2 framer for non-ATM applications by

setting the FRMRONLY bit in the S/UNI-JET

Configuration 1 Register to logic one.

TFPI indicates the position of all overhead bits in each

DS3 M-subframe, the first bit in each G.751 E3 or G.832

E3 frame, or the first framing bit in each J2 frame. TFPI

is not required to pulse at every frame boundary in E3 or

J2 modes.

TMFPI indicates the position of the first bit in each DS3

M-frame, the first bit in each E3 frame, or the first framing

bit in each J2 multiframe. TMFPI is not required to pulse

at every multiframe boundary.

TFPI/TMFPI is sampled on the rising edge of TICLK.

PM7347 датащи(PDF) 40 Page - PMC-Sierra, Inc

PM7347 датащи(HTML) 40 Page - PMC-Sierra, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL