User manual

Glossary

Big-endian memory Memory in which:

- a byte or halfword at a word-aligned address is the most significant byte or halfword

within the word at that address

- a byte at a halfword-aligned address is the most significant byte within the halfword

at that address.

See also Little-endian memory.

Block address An address that comprises a tag, an index, and a word field. The tag bits identify the way

that contains the matching cache entry for a cache hit. The index bits identify the set

being addressed. The word field contains the word address that can be used to identify

specific words, halfwords, or bytes within the cache entry.

See also Cache terminology diagram on the last page of this glossary.

Boundary scan chain

A boundary scan chain is made up of serially-connected devices that implement

boundary scan technology using a standard JTAG TAP interface. Each device contains

at least one TAP controller containing shift registers that form the chain connected

between TDI and TDO, through which test data is shifted. Processors can contain

several shift registers to enable you to access selected parts of the device.

Breakpoint A breakpoint is a mechanism provided by debuggers to identify an instruction at which

program execution is to be halted. Breakpoints are inserted by the programmer to enable

inspection of register contents, memory locations, variable values at fixed points in the

program execution to test that the program is operating correctly. Breakpoints are

removed after the program is successfully tested.