VSC7217UC / Vitesse Semiconductor Corporation

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Part No.	VSC7217UC
Manufacturer	VITESSE
Size	506 Kbytes
Pages	36 pages
Description	Multi-Gigabit Interconnect Chip

Datasheet Summary with AI

# VSC7217 Multi-Gigabit Interconnect Chip

## Overview
️· Preliminary datasheet for the VSC7217, a multi-gigabit interconnect chip by Vitesse Semiconductor Corporation.
️· Designed for high-speed data transmission and reception.

## Input/Output & Timing
️· TMODE(2:0): Configures input timing reference (REFCLK rising edge, TBCA/TBCn rising/data edge).
️· RMODE(1:0): Configures output timing reference (REFCLK centered/leading, RCLKA/RCLKNA, RCLKn/RCLKNn).
️· WSENn, C/Dn, KCHAR: Control encoded 10-bit output selection.
️· LBENn(1:0): Configures loopback mode (Normal, Parallel, Serial).
️· Signals for serial data source (RXP/Rn).

## Functional Features
️· Deserialization & Character Alignment: Converts serial data to 10-bit characters, recognizes "Comma" patterns (0011111xxx or 1100000xxx) for framing. K28.5 is the IDLE character.
️· 10B/8B Decoder: Decodes 10-bit characters to 8-bit data and generates status information (errors, K-character detection).
️· Elastic Buffer & Channel Deskewing: Facilitates channel alignment and rate matching with IDLE insertion/deletion. Recenters on RESETN, Comma detection, or Word Sync.
️· Word Alignment: Aligns data from four channels to reconstruct a 32-bit word.
️· Decoder Bypass Mode: Allows 10-bit interface operation when ENDEC is LOW.

## Error Handling & Status
️· ERRn, KCHn, IDLEn: Output signals indicating link status and errors (Disparity, Out-of-Band, Loss of Synchronization).
️· Priority levels are assigned to different error conditions.

## Compatibility
️· Compatible with VSC7211 and VSC7214 at the serial link level.
️· Requires specific configurations for parallel interface compatibility.
️· Shares encoding scheme and Word Sync Sequence with VSC7211/VSC7214.
️· VSC7217 requires a single Comma for synchronization while VSC7211/VSC7214 require four.