HD64F2149 Datasheet, PDF (150/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

5.4 Address Breaks
5.4.1 Features
With the H8S/2169 or H8S/2149, it is possible to identify the prefetch of a specific address by the
CPU and generate an address break interrupt, using the ABRKCR and BAR registers. When an
address break interrupt is generated, address break interrupt exception handling is executed.
This function can be used to detect the beginning of execution of a bug location in the program,
and branch to a correction routine.
5.4.2 Block Diagram
A block diagram of the address break function is shown in figure 5.5.
BAR
ABRKCR
Match
signal
Comparator
Control logic
Address break
interrupt request
Internal address
Prefetch signal
(internal signal)
Figure 5.5 Block Diagram of Address Break Function
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