SMSC TMC2005-JT FIGURE 4 - APPLICATION EXAMPLE

ARCNET 5 Port HUB Controller

Datasheet

Example 4: An on-board type HUB with a COM20020 and four optical transceivers in backplane mode.

FIGURE 4 - APPLICATION EXAMPLE 4

Only the TMC2005 and four transceivers with the COM20020 are indicated in the above figure. Connect the other pins adequately.

SMSC TMC2005-JT

Page 15

Revision 1.1 (07-24-07)

DATASHEET

Contents

FEATURES GENERAL DESCRIPTION ORDERING INFORMATION Page TABLE OF CONTENTS PIN CONFIGURATION BLOCK DIAGRAM DESCRIPTION OF PIN FUNCTIONS TX/RX Interface FEATURE Operating Mode Setup INPUT PLL Must always connect to VDD Other Signals FEATURES OPERATIONAL DESCRIPTION Direction Determination Direction Release Jitter Filter 1)Input Sampling Option Feature for Jitter Filtering 1)Big jitter (BJ) mode Note: [Complement] 2)Changing polar of RX port APPLICATION NOTES FIGURE 2 - APPLICATION EXAMPLE FIGURE 3 - APPLICATION EXAMPLE FIGURE 4 - APPLICATION EXAMPLE FIGURE 5 - APPLICATION EXAMPLE FIGURE 6 - APPLICATION EXAMPLE FIGURE 7 - APPLICATION EXAMPLE FIGURE 8 - APPLICATION EXAMPLE PORT GROUP CONNECTING THE TMC2005 WITH INTERNAL PLL Method To Connect A Crystal Clock FIGURE 11 - CONNECTING THE CRYSTAL CLOCK Note 1: Note 2: nPLLTST pin CASCADING CONNECTION FIGURE 13 - CASCADE CONNECTION OF 8 PORT HUB FIGURE 14 - CASCADE CONNECTION OF 8 PORT HUB FIGURE 15 - CASCADE CONNECTION OF 16 PORT HUB Ring Network With the TMC2005 FIGURE 16 - RING CONFIGURATION Example for system hang-up Example for no hang-up Note 3: MAXIMUM GUARANTEED RATINGS Vss ITEM SYMBOL RATING DC CHARACTERISTIC - OUTPUT PIN PIN AC CHARACTERISTIC - CLOCK and RESET TYP FIGURE 17 - CLOCK AND RESET AC CHARACTERISTIC – Rx waveforms and Tx waveforms FIGURE 18 - RX WAVEFORMS AND TX WAVEFORMS ITEMS MARK REMARK Page TMC2005-JT64 PIN TQFP PACKAGE OUTLINE