SMSC USB2507 User Manual download pdf (Page 38)

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

Revision 2.3 (08-27-07) 38 SMSC USB2507

DATASHEET

Chapter 6 XNOR Test

XNOR continuity tests all signal pins on the Hub (every pin except for NC, XTAL1/CLKIN, XTAL2,

ATEST/REG_EN, RBIAS, TEST1, Power, and Ground). This functionality is enabled by driving TEST1

and CFG_SEL[1] high, driving SCLK low and transition RESET_N from low to high. The output from

the XNOR chain is driven to GR2 . For each pin tested for continuity GR2 should toggle.

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