Section 4 Address Break; Overview; Block Diagram - Hitachi H8/3664 Hardware Manual

Table of Contents

The address break simplifies on-board program debugging. It requests an address break interrupt

when the set break condition is satisfied. The interrupt request is not affected by the I bit of CCR.

Break conditions that can be set include instruction execution at a specific address and a

combination of access and data at a specific address. With the address break function, the

execution start point of a program containing a bug is detected and execution is branched to the

correcting program.

Figure 4.1 shows a block diagram of the address break.

control circuit

BARH, BARL: Break address register

BDRH, BDRL: Break data register

Section 4 Address Break

Internal address bus

Address break control register

Address break status register

Figure 4.1 Block Diagram of an Address Break