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SCANSTA112 Datasheet 7-Port Multidrop IEEE 1149.1 Multiplexer

Manufacturer: Texas Instruments

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General Description

The SCANSTA112 extends the IEEE Std.

1149.1 test bus into a multidrop test bus environment.

The advantage of a multidrop approach over a single serial scan chain is improved test throughput and the ability to remove a board from the system and retain test access to the remaining modules.

Overview

SCANSTA112 www.ti.com SNLS161I – DECEMBER 2002 – REVISED APRIL 2013 SCANSTA112 7-Port Multidrop IEEE 1149.

Key Features

  • 1.
  • 2 True IEEE 1149.1 Hierarchical and Multidrop Addressable Capability.
  • The 8 Address Inputs Support up to 249 Unique Slot Addresses, an Interrogation Address, Broadcast Address, and 4 Multi-Cast Group Addresses (Address 000000 is Reserved).
  • 7 IEEE 1149.1-Compatible Configurable Local Scan Ports.
  • Bi-directional Backplane and LSP0 Ports are Interchangeable Slave Ports.
  • Capable of Ignoring TRST of the Backplane Port when it Becomes the Slave.

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