HD64336901G Renesas Technology, HD64336901G Datasheet - Page 87

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

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.
4.1
Address break has the following registers.
ABK0001A_000020020200
Address break control register (ABRKCR)
Address break status register (ABRKSR)
Break address register (BARH, BARL)
Break data register (BDRH, BDRL)
Register Descriptions
control circuit
generation
Interrupt
[Legend]
BARH, BARL: Break address register
BDRH, BDRL: Break data register
ABRKCR:
ABRKSR:
Figure 4.1 Block Diagram of Address Break
Section 4 Address Break
Address break control register
Address break status register
BARH
BDRH
Internal address bus
Comparator
Comparator
ABRKCR
ABRKSR
BARL
BDRL
Rev. 1.00, 11/03, page 59 of 376
Interrupt