FTTC User Framer

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