H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 123

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

To use the address break function, set each register as follows:
1. Set a break address in the A23 to A1 bits in BAR.
2. Set the BIE bit in ABRKCR to 1 to enable the address break.
When the BIE bit is cleared to 0, an address break is not requested.
When the setting conditions are satisfied, the CMF flag in ABRKCR is set to 1 to request an
interrupt. The interrupt source should be determined by the interrupt handling routine if necessary.
5.7.4
1. In an address break, the break address should be an address where the first byte of the
2. In normal mode, addresses A23 to A16 are not compared.
3. When the branch instructions (Bcc, BSR), jump instructions (JMP, JSR), RST instruction, and
4. An address break interrupt is generated by combining the internal prefetch signal and an
Figure 5.9 shows an example of address timing.
instruction exists. Otherwise, a break condition will not be satisfied.
RTE instruction are placed immediately prior to the address specified by BAR, a prefetch
signal to the address may be output to request an address break by executing these instruction.
It is necessary to take countermeasures: do not set a break address to an address immediately
after these instructions, or determine whether interrupt handling is performed by satisfaction of
a normal condition.
address. Therefore, the timing to enter the interrupt exception handling differs according to the
instructions at the specified and at prior addresses and execution cycles.
Usage Notes
Rev. 2.00 Mar 21, 2006 page 85 of 518
Section 5 Interrupt Controller
REJ09B0299-0200