HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 93

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

4.5 Stack Status after Exception Handling
Figure 4-6 shows the stack after completion of trap instruction exception handling and interrupt
exception handling.
SP-4
SP-3
SP-2
SP-1
SP (ER7)
Legend
PCE:
PCH:
PCL:
CCR:
SP:
Notes:
Bits 23 to 16 of program counter (PC)
Bits 15 to 8 of program counter (PC)
Bits 7 to 0 of program counter (PC)
Condition code register
Stack pointer
1.
2.
PC indicates the address of the first instruction that will be executed after return.
Registers must be saved in word or longword size at even addresses.
Before exception handling
Figure 4-6 Stack after Completion of Exception Handling
Stack area
Pushed on stack
SP (ER7)
SP+1
SP+2
SP+3
SP+4
79
After exception handling
CCR
PC
PC
PC
E
H
L
Even address