PM4328-PI PMC-Sierra, Inc., PM4328-PI Datasheet - Page 78
PM4328-PI
Manufacturer Part Number
PM4328-PI
Description
Framer, T1|E1|T3 Standard Format, 324-BGA
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM4328-PI.pdf
(250 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PM4328-PI
Manufacturer:
ATMEL
Quantity:
320
- Current page: 78 of 250
- Download datasheet (2Mb)
STANDARD PRODUCT
DATASHEET
PMC-2011596
9.7 Elastic Store (ELST)
9.8 Signaling Elastic Stores (RX-SIG-ELST and TX_SIG-ELST)
PROPRIETARY AND CONFIDENTIAL
The Elastic Store (ELST) synchronizes ingress frames to the common ingress
clock and frame pulse (CICLK, CIFP) in the Clock Slave ingress modes or to the
common ingress H-MVIP clock and frame pulse (CMV8MCLK, CMVFP,
CMVFPC) in H-MVIP modes. The frame data is buffered in a two frame circular
data buffer. Input data is written to the buffer using a write pointer and output
data is read from the buffer using a read pointer.
When the elastic store is being used, if the average frequency of the incoming
data is greater than the average frequency of the backplane clock, the write
pointer will catch up to the read pointer and the buffer will be filled. Under this
condition a controlled slip will occur when the read pointer crosses the next
frame boundary. The subsequent ingress frame is deleted.
If the average frequency of the incoming data is less than the average frequency
of the backplane clock, the read pointer will catch up to the write pointer and the
buffer will be empty. Under this condition a controlled slip will occur when the
read pointer crosses the next frame boundary. The previous ingress frame is
repeated.
A slip operation is always performed on a frame boundary.
When the ingress timing is recovered from the receive data the elastic store can
be bypassed to eliminate the 2 frame delay. In this configuration (the Clock
Master ingress modes), the elastic store is used to synchronize the ingress
frames to the transmit line clock so that per-DS0 loopbacks may be enabled.
To allow for the extraction of signaling information in the data channels,
superframe identification is also passed through the ELST.
For payload conditioning, the ELST may optionally insert a programmable idle
code into all channels when the framer is out of frame synchronization. This
code is set to all 1’s when the ELST is reset.
If the data is required to pass through the TECT3 unchanged during an out-of-
frame condition, then the elastic store may be bypassed.
There are two additional elastic stores used to adapt the differences in rate
between the CAS or CCS H-MVIP signaling rates and the serial clock and data
or SBI data rates when in simultaneous SBI or serial clock and data with
ISSUE 1
65
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
PM4328 TECT3
Related parts for PM4328-PI
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
High density T1/E1 framer with intefrated M13 multiplexer
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
2 Megabit (256K x 8) 5.0 Volt-only CMOS Flash Memory
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
Interface, Multi-rate Telecom Backplane SERDES for 2.5Gbit/s Interconnect
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
processor, Spectra-9953 Device Driver
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
Ethernet, 8 Channel 10/100 Ethernet over SONET/SDH Mapping Device
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
Interface, Single Chip ADM for 622 & 155Mbit/s
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
Interface, Single Chip ADM for 622 & 155Mbit/s
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
Interface, Multi-rate SATURN User Network Interface for 2x622 and 4x155
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR
Manufacturer:
PMC-Sierra, Inc.
Datasheet:
Part Number:
Description:
Processor, SONET/SDH Tributary Unit Payload Processor for 2488.32Mbit/s
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
Manufacturer:
PMC-Sierra, Inc.
Datasheet:
Part Number:
Description:
SONET/SDH, Single Chip 96 Port SONET/SDH Cross-Connect Switch Element
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
ATM, Sixteen Channel ATM PHY Interface for 155.52 Mbps
Manufacturer:
PMC-Sierra, Inc.
Part Number:
Description:
ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
Manufacturer:
PMC-Sierra, Inc.
Datasheet:
Part Number:
Description:
Interface, 4-Channel ATM and Bit HDLC User Network Interface
Manufacturer:
PMC-Sierra, Inc.