r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 142
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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5. Exception Handling
(7)
• Sources:
• Transition address: VBR + H'00000100
• Transition operations:
Rev.1.00 Jan. 10, 2008 Page 112 of 1658
REJ09B0261-0100
Instruction_address_error()
{
}
⎯ Instruction fetch from other than a word boundary (2n +1)
⎯ Instruction fetch from area H'80000000 to H'FFFFFFFF in user mode
The virtual address (32 bits) at which this exception occurred is set in TEA, and the
corresponding virtual page number (22 bits) is set in PTEH [31:10]. ASID in PTEH indicates
the ASID when this exception occurred.
The PC and SR contents for the instruction at which this exception occurred are saved in the
SPC and SSR. The R15 contents at this time are saved in SGR.
Exception code H'0E0 is set in EXPEVT. The BL, MD, and RB bits are set to 1 in SR, and a
branch is made to PC = VBR + H'0100. For details, see section 7, Memory Management Unit
(MMU).
Instruction Address Error
TEA = EXCEPTION_ADDRESS;
PTEH.VPN = PAGE_NUMBER;
SPC = PC;
SSR = SR;
SGR = R15;
EXPEVT = H'0000 00E0;
SR.MD = 1;
SR.RB = 1;
SR.BL = 1;
PC = VBR + H'0000 0100;
Area H'E5000000 to H'E5FFFFFF can be accessed in user mode. For details, see section 9,
On-Chip Memory.
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