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60
CHAPTER 3 CPU AND CONTROL UNITS
5. "00100
B
"
→
ILM
6. "0"
→
S-flag
7. (TBR + 3CC
H
)
→
PC
If the T-flag is set to enable the step trace trap function, user NMIs and user interrupts are disabled. In
addition, the INTE instruction no longer generates an EIT.
A trap is generated at the execution of the instruction immediately after setting the T-flag.
■
Processing of Undefined Instruction Exception
If an instruction is found undefined during instruction decoding, an undefined instruction exception occurs.
[Undefined instruction exception detection conditions]
• Instruction found undefined during instruction decoding
• Placed outside the delay slot (not immediately after the delayed branch instruction)
• If the above conditions are satisfied, an undefined instruction exception occurs, causing a break.
[Processing]
1. SSP - 4
→
SSP
2. PS
→
(SSP)
3. SSP - 4
→
SSP
4. PC
→
(SSP)
5. "0"
→
S-flag
6. (TBR + 3C4
H
)
→
PC
The PC saves the address of the instruction where the undefined instruction exception was detected.
■
Coprocessor Absence Trap
A coprocessor absence trap occurs if a coprocessor instruction which attempts to use an absent coprocessor
is executed.
[Processing]
1. SSP - 4
→
SSP
2. PS
→
(SSP)
3. SSP - 4
→
SSP
4. Next instruction's address
→
(SSP)
5. "0"
→
S-flag
6. (TBR + 3E0
H
)
→
PC
Summary of Contents for FR60Lite
Page 3: ......
Page 5: ......
Page 115: ...100 CHAPTER 3 CPU AND CONTROL UNITS ...
Page 127: ...112 CHAPTER 4 I O PORTS ...
Page 143: ...128 CHAPTER 5 INTERRUPT CONTROLLER ...
Page 155: ...140 CHAPTER 6 EXTERNAL INTERRUPT AND NMI CONTROLLER ...
Page 197: ...182 CHAPTER 9 PPG Programmable Pulse Generator ...
Page 337: ...322 CHAPTER 13 UART ...
Page 417: ...402 CHAPTER 16 DMAC DMA Controller ...
Page 445: ...430 CHAPTER 17 FLASH MEMORY ...
Page 451: ...436 CHAPTER 18 SERIAL PROGRAMMING CONNECTION ...
Page 493: ...478 APPENDIX F Precautions on Handling ...
Page 494: ...479 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 507: ...492 INDEX ...
Page 509: ......