SCANSTA111 Datasheet (National Semiconductor) - Enhanced SCAN bridge Multidrop Addressable IEEE 1149.1 (JTAG) Port

SCANSTA111, Enhanced SCAN bridge Multidrop Addressable IEEE 1149.1 (JTAG) Port

The SCANSTA111 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.

Each SCANST

SCANSTA111 Features

* n True IEEE 1149.1 hierarchical and multidrop addressable capability n The 7 slot inputs support up to 121 unique addresses, an Interrogation Address, Broadcast Address, and 4 Multi-cast Group Addresses (address 000000 is reserved) Connection Diagrams 10124516 10124502 © 2004 National Semiconduc