MC92052 Datasheet, PDF (1/6 Pages) Motorola, Inc – FTTC User Framer

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Product Brief
MC92052
FTTC User Framer
Order this Data Sheet by MC92052/D
MC92052
The MC92052 is a peripheral device for the user side of an FTTC drop. It is composed of downstream and upstream
TC-sublayer functionality with UTOPIA compliant ATM-layer ports.
MC92052 Features
• Implements the DAVIC short-range baseband asymmetrical physical layer standard
• Supports a bit rate of up to 51.84 Mbit/sec downstream
• Provides TDMA at a bit rate of up to 6.48 Mbit/s upstream, including DAVIC Bit Rates B, C, and D
• Interfaces to an ATM-layer device using a UTOPIA compliant interface
• Performs convolutional deinterleaving of the downstream payload blocks for the full range of interleaving depths
(M = 1-31) using an external 16K x 8 SRAM
• Can optionally use an internal RAM for deinterleaving when the interleaving depth is small (M ≤ 2)
• Performs Reed-Solomon encoding of the upstream frames and decoding of the downstream frames
• Performs HEC-based cell delineation and error correction on the downstream data
• Optionally filters received ATM cells based on GFC/VPI pattern matching
• Includes serial data interfaces to a Physical Medium Dependent (PMD) sublayer device
• Optional serial data link interfaces for upstream and downstream frames
• Includes a power level control interface to the transmitter
• Provides an 8-bit system interface as a generic slave device
• IEEE 1149.1 (JTAG) boundary scan test port
• 3.3 V operation with TTL compatibility on I/O pins
• Extended temperature operation: -40 to 85 ^°C
• Available in 128 Pin Plastic Quad Flat Package
Rx
Frame
Deinter-
leaver
Reed-
Solomon
Decoder
Deran-
domizer
Rx Cell
Functions
Rx
UTOPIA
I/F
PMD
Align-
I/F
ment
RAM
Reed-
Solomon
Decoder
Deran-
domizer
Header
Interpretation
Data
Link
Extraction
Tx
PMD
I/F
Microprocessor
Interface
Reed-
Solomon
Encoder
Random-
izer
Header
Generation
Data
Link
Insertion
Tx Cell
Functions
Tx
UTOPIA
I/F
JTAG Controller
Figure 1. MC92052 Block Diagram
This document contains information on a new product.
Specifications and information herein are subject to change without notice.
© MOTOROLA, INC. 1997