HD6433682 ETC, HD6433682 Datasheet - Page 90

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

3.4.4
Table 3.2 shows the number of wait states after an interrupt request flag is set until the first
instruction of the interrupt handling-routine is executed.
Table 3.2
Note: * Not including EEPMOV instruction.
Rev. 3.00, 05/03, page 60 of 472
Item
Waiting time for completion of executing instruction*
Saving of PC and CCR to stack
Vector fetch
Instruction fetch
Internal processing
SP – 4
SP – 3
SP – 2
SP – 1
SP (R7)
Legend:
PC H :
PC L :
CCR:
SP:
Notes:
Interrupt Response Time
Interrupt Wait States
Upper 8 bits of program counter (PC)
Lower 8 bits of program counter (PC)
Condition code register
Stack pointer
2.
3. Ignored when returning from the interrupt handling routine.
1.
Register contents must always be saved and restored by word length, starting from
an even-numbered address.
PC shows the address of the first instruction to be executed upon return from the interrupt
handling routine.
Prior to start of interrupt
Figure 3.2 Stack Status after Exception Handling
exception handling
Stack area
saved to stack
PC and CCR
SP (R7)
SP + 1
SP + 2
SP + 3
SP + 4
After completion of interrupt
States
1 to 23
4
2
4
4
exception handling
CCR
CCR
PCH
PCL
*3
Even address
Total
15 to 37