hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 137

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Figure 3.5 shows a typical interrupt sequence.
SP − 4
SP − 3
SP − 2
SP − 1
SP (R7)
[Legend]
PC
PC
CCR:
SP:
Notes:
H
L
Figure 3.4 Stack State after Completion of Interrupt Exception Handling
:
:
2.
*
1.
Upper 8 bits of program counter (PC)
Lower 8 bits of program counter (PC)
Condition code register
Stack pointer
Prior to start of interrupt
Register contents must always be saved and restored by word access,
starting from an even-numbered address.
Ignored on return.
PC shows the address of the first instruction to be executed upon
return from the interrupt handling routine.
exception handling
Stack area
saved to stack
PC and CCR
SP (R7)
SP + 1
SP + 2
SP + 3
SP + 4
After completion of interrupt
Rev. 7.00 Mar 10, 2005 page 95 of 652
exception handling
CCR
CCR
PC
Section 3 Exception Handling
PC
H
L
*
REJ09B0042-0700
Even address