HD64336901G Renesas Technology, HD64336901G Datasheet - Page 90

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

4.1.3
BARH and BARL are 16-bit read/write registers that set the address for generating an address
break interrupt. When setting the address break condition to the instruction execution cycle, set the
first byte address of the instruction. The initial value of this register is H'FFFF.
4.1.4
BDRH and BDRL are 16-bit read/write registers that set the data for generating an address break
interrupt. BDRH is compared with the upper 8-bit data bus. BDRL is compared with the lower 8-
bit data bus. When memory or registers are accessed by byte, the upper 8-bit data bus is used for
even and odd addresses in the data transmission. Therefore, comparison data must be set in BDRH
for byte access. For word access, the data bus used depends on the address. See section 4.1.1,
Address Break Control Register (ABRKCR), for details. The initial value of this register is
undefined.
Rev. 1.00, 11/03, page 62 of 376
Break Address Registers (BARH, BARL)
Break Data Registers (BDRH, BDRL)