NEC PD754144 User Manual
Page 73
CHAPTER 4 INTERNAL CPU FUNCTION
73
User’s Manual U10676EJ3V0UM
Figure 4-11. Data Saved to Stack Memory (MkII Mode)
Stack
SP – 1
SP
PUSH instruction
Stack
PC11-PC8
PC3-PC0
PC7-PC4
CALL, CALLA, CALLF instruction
Stack
Interrupt
SP – 4
SP – 3
SP – 2
SP – 5
PC11-PC8
PC3-PC0
PC7-PC4
SP – 2
SP – 1
SP
SP – 3
SP – 4
SP – 5
0
0
0
0
0
0
0
0
CY
SK2
MBE RBE
SK1 SK0
IST0
IST1
PSW
SP – 2
Register pair, low
Register pair, high
SP – 6
SP – 6
*
*
MBE RBE
*
*
*
*
Note
SP – 1
SP
Figure 4-12. Data Restored from Stack Memory (MkII Mode)
Stack
SP + 1
SP + 2
POP instruction
Stack
PC11-PC8
PC3-PC0
PC7-PC4
RET, RETS instruction
Stack
RETI instruction
SP + 2
SP + 3
SP + 4
SP + 1
PC11-PC8
PC3-PC0
PC7-PC4
SP + 4
SP + 5
SP + 6
SP + 3
SP + 2
SP + 1
0
0
0
0
0
0
0
0
CY
SK2
MBE RBE
SK1 SK0
IST0
IST1
PSW
SP
Register pair, low
Register pair, high
SP
SP
*
*
MBE RBE
*
*
*
*
Note
SP + 5
SP + 6
Note The contents of PSW other than MBE and RBE are not saved or restored.
Remark
*: Undefined