HD64F3664FP datasheet(95/444 Pages) RENESAS

Part #	HD64F3664FP

Description	Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

PDF	444 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 4 Address Break

Rev. 6.00 Mar. 24, 2006 Page 67 of 412

REJ09B0142-0600

Section 4 Address Break

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.

BARH

BARL

BDRH

BDRL

ABRKCR

ABRKSR

Internal address bus

Comparator

Interrupt

generation

control circuit

Comparator

Interrupt

[Legend]

BARH, BARL: Break address register

BDRH, BDRL: Break data register

ABRKCR:

Address break control register

ABRKSR:

Address break status register

Figure 4.1 Block Diagram of Address Break

HD64F3664FP Datasheet(PDF) 95 Page - Renesas Technology Corp