© VITESSE SEMICONDUCTOR CORPORATION

Page 19

6/14/00

741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896

VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Datasheet

VSC7217

Multi-Gigabit Interconnect Chip

G52325-0, Rev. 3.0

VSC7214 MODE 1: RCLKEN=LOW, FLOCK=LOW, INDEP=HIGH

Receiver

Rn(7:0), ERRn, KCHn and IDLEn outputs are synchronous to REFCLK, IDLE insertion/dele-

tion is enabled, and the receive channels are independent. The VSC7217 should be configured with

RMODE(1:0)=00, FLOCK=0, and WSI=1. The WSI connection inhibits channel alignment, and allows

IDLE insertion/deletion to occur independently in each channel.

VSC7214 MODE 2: RCLKEN=LOW, FLOCK=HIGH, INDEP=LOW

Receiver

Rn(7:0), ERRn, KCHn and IDLEn outputs are synchronous to REFCLK, IDLE insertion/dele-

tion is disabled, and the receive channels are word-aligned. The VSC7217 should be configured with

RMODE(1:0)=00, FLOCK=1, and WSI connected to its own WSO or to the WSO of another VSC7217

if multiple devices are to be used in parallel. The

WSI connection allows word alignment to occur, and the

FLOCK connection inhibits IDLE insertion/deletion.

VSC7214 MODE 3: RCLKEN=LOW, FLOCK=HIGH, INDEP=HIGH

Receiver

Rn(7:0), ERRn, KCHn and IDLEn outputs are synchronous to REFCLK, IDLE insertion/dele-

tion is disabled, and the receive channels are independent. The VSC7217 should be configured with

RMODE(1:0)=00, FLOCK=1, and WSI=0. The WSI connection inhibits channel alignment, and the

FLOCK connection inhibits IDLE insertion/deletion.

VSC7214 MODE 4: RCLKEN=HIGH, FLOCK=LOW, INDEP=LOW

This configuration does not require IDLE insertion/deletion, use Mode 6 instead.

VSC7214 MODE 5: RCLKEN=HIGH, FLOCK=LOW, INDEP=HIGH

Receiver

Rn(7:0), ERRn, KCHn and IDLEn outputs are synchronous to RCLKn/RCLKNn, IDLE inser-

tion/deletion is enabled, and the receive channels are independent. The VSC7217 should be configured with

RMODE(1:0)=10, FLOCK=0, and WSI=1. The WSI connection inhibits channel alignment, and allows

IDLE insertion/deletion to occur independently in each channel. The B, C and D channel

RCLKn/

RCLKNn outputs are copies of RCLKA/RCLKNA.

VSC7214 MODE 6: RCLKEN=HIGH, FLOCK=HIGH, INDEP=LOW

Receiver

Rn(7:0), ERRn, KCHn and IDLEn outputs are synchronous to RCLKn/RCLKNn, IDLE inser-

tion/deletion is disabled, and the receive channels are word-aligned. The VSC7217 should be configured

with

RMODE(1:0)=10, FLOCK=1, and WSI connected to its own WSO. Multiple VSC7217 devices

should not be used in parallel when the outputs are synchronous to

RCLKn/RCLKNn. The WSI connec-

tion allows word alignment to occur, and the

FLOCK connection inhibits IDLE insertion/deletion.

VSC7214 MODE 7: RCLKEN=HIGH, FLOCK=HIGH, INDEP=HIGH

Receiver

Rn(7:0), ERRn, KCHn and IDLEn outputs are synchronous to RCLKn/RCLKNn, IDLE inser-

tion/deletion is disabled, and the receive channels are independent. The VSC7217 should be configured

with

RMODE(1:0)=10, FLOCK=1, and WSI=0. The WSI connection inhibits channel alignment, and the

FLOCK connection inhibits IDLE insertion/deletion.