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Features

The main features of the Core are:

? High-speed, 16-bit processing with the same programming model and instruction set as the

Motorola 68HC12 CPU

? Full 16-bit data paths for efficient arithmetic operation and high-speed mathematical execution

? Allows instructions with odd byte counts, including many single-byte instructions for more

efficient use of program memory space

? Three stage instruction queue to buffer program information for more efficient CPU execution

? Extensive set of indexed addressing capabilities including:

– Using the stack pointer as an indexing register in all indexed operations

– Using the program counter as an indexing register in all but auto increment/decrement mode

– Accumulator offsets using A, B or D accumulators

– Automatic index pre-decrement, pre-increment, post-decrement and post-increment (by -8 to

+8)

– 5-bit, 9-bit or 16-bit signed constant offsets

– 16-bit offset indexed-indirect and accumulator D offset indexed-indirect addressing

? Provides 2 to 122 I bit maskable interrupt vectors, 1 X bit maskable interrupt vector, 2 nonmaskable

CPU interrupt vectors and 3 reset vectors

? Optional register configurable highest priority I bit maskable interrupt

? On-chip memory and peripheral block interfacing with internal memory expansion capability and

external data chip select

? Configurable system memory and mapping options

? External Bus Interface (8-bit or 16-bit, multiplexed or non-multiplexed)

? Multiple modes of operation

? Hardware breakpoint support for forced or tagged breakpoints with two modes of operation:

– Dual Address Mode to match on either of two addresses

– Full Breakpoint Mode to match on address and data combination

? Single-wire background debug system implemented in on-chip hardware

? Secured mode of operation

? Fully synthesizable design

? Single Core clock operation

? Full Mux-D scan test implementation