Section 5 Exception Handling
Rev. 3.00 Sep. 27, 2007 Page 77 of 758
REJ09B0243-0300
5.3 Address
Errors
5.3.1
Address Error Sources
Address errors occur when instructions are fetched or data is read from or written to, as shown in
table 5.6.
Table 5.6
Bus Cycles and Address Errors
Bus Cycle
Type
Bus Master
Bus Cycle Description
Address Errors
CPU
Instruction fetched from even address
None (normal)
Instruction
fetch
Instruction fetched from odd address
Address error occurs
Instruction fetched from a space other than
on-chip peripheral module space
None (normal)
Instruction fetched from on-chip peripheral
module space
Address error occurs
Instruction fetched from external memory
space in single chip mode
Address error occurs
Word data accessed from even address
None (normal)
Data
read/write
CPU
Word data accessed from odd address
Address error occurs
Longword data accessed from a longword
boundary
None (normal)
Longword data accessed from other than a
long-word boundary
Address error occurs
Byte or word data accessed in on-chip
peripheral module space
None (normal)
Longword data accessed in 16-bit on-chip
peripheral module space
None (normal)
Longword data accessed in 8-bit on-chip
peripheral module space
None (normal)
Reserved space accessed when in single
chip mode
Address error occurs
Содержание SH7124 R5F7124
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