LU82551ER 860613 Intel, LU82551ER 860613 Datasheet - Page 79
LU82551ER 860613
Manufacturer Part Number
LU82551ER 860613
Description
Manufacturer
Intel
Datasheet
1.LU82551ER_860613.pdf
(104 pages)
Specifications of LU82551ER 860613
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10.0
10.1
10.2
10.2.1
Datasheet
82551ER Test Port Functionality
Introduction
The 82551ER’s XOR Tree Test Access Port (TAP) is the access point for test data to and from the
device. The port provides the ability to perform basic production level testing.
Test Function Description
The 82551ER TAP mode supports two tests that can be used in board level design. These tests help
verify basic functionality as well as test the integrity of solder connection on the board. The tests
are described in the following subsections.
Tristate
The tristate command sets all 82551ER input and output pins into a tristate (high-Z) mode (all
internal pull-ups and pull-downs are disabled). This mode is entered by setting the following test
pin combination and resetting the device:
TEST = 1
TCK = 0
TEXEC = 0
TI = 1
Networking Silicon — 82551ER
71
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