HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 103
HD6417618
Manufacturer Part Number
HD6417618
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417618.pdf
(646 pages)
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5.3
5.3.1
Address errors occur when instructions are fetched or data is read from or written to, as shown in
table 5.6.
Table 5.6
5.3.2
When an address error exception is generated, the bus cycle which caused the address error ends,
the current instruction finishes, and then the address error exception handling starts. The CPU
operates as follows:
1. The status register (SR) is saved to the stack.
2. The program counter (PC) is saved to the stack. The PC value to be saved is the start address
3. The start address of the exception handling routine is fetched from the exception handling
Type
Instruction
fetch
Data
read/write
of the instruction which caused an address error exception. When the instruction that caused
the exception is placed in the delay slot, the address of the delayed branch instruction which is
placed immediately before the delay slot.
vector table that corresponds to the generated address error, and the program starts executing
from that address. This branch is not a delayed branch.
Bus Cycle
Address Errors
Address Error Sources
Address Error Exception Source
Bus Cycles and Address Errors
Bus Master
CPU
CPU
Bus Cycle Description
Instruction fetched from even address
Instruction fetched from odd address
Word data accessed from even address
Word data accessed from odd address
Longword data accessed from a longword
boundary
Longword data accessed from other than a
long-word boundary
Rev. 6.00 Jun. 12, 2007 Page 71 of 610
Section 5 Exception Handling
Address Errors
None (normal)
Address error occurs
None (normal)
Address error occurs
None (normal)
Address error occurs
REJ09B0131-0600
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