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BYPASS Instruction — Intel
®
82575EB Gigabit Ethernet Controller
324632-003 Intel
®
82575EB Gigabit Ethernet Controller
Revision: 2.1 Software Developer’s Manual and EEPROM Guide
January 2011 451
15.2.4 BYPASS Instruction
This instruction is the only instruction defined by the standard that causes operation of the bypass
register. The bypass register contains a single-shift register stage and is used to provide a minimum
length serial path between the TDI and TDO pins of a component when no test operation of that
component is required. This allows more rapid movement of test data to and from other components on
a board that are required to perform test operations.
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