Data Restored From The Stack Memory (Mk Ii Mode) - NEC PD750004 User Manual

Figure 4-15. Data Restored from the Stack Memory (Mk II Mode)
POP instruction
Stack
SP
Lower bits of pair register
SP + 1 Upper bits of pair register
SP + 2
Notes 1. PC12 and PC13 are 0 in the µPD750004. PC13 is 0 in the µPD750006 and µPD750008.
2. PSW bits other than MBE and RBE are not saved or restored.
Remark * indicates an undefined bit.
CHAPTER 4 INTERNAL CPU FUNCTIONS
RET or RETS instruction
Stack
SP PC11 - PC8
Note 1
SP + 1 0 0 PC13 PC12
SP + 2 PC3 - PC0
SP + 3 PC7 - PC4
MBE RBE
SP + 4
* *
SP + 5
* * *
SP + 6
RETI instruction
SP PC11 - PC8
Note 1
SP + 1 0
SP + 2 PC3 - PC0
SP + 3 PC7 - PC4
IST1 IST0
SP + 4
Note 2
CY SK2
SP + 5
*
SP + 6
Stack
Note 1
Note 1
0 PC13 PC12
MBE RBE
PSW
SK1 SK0
6 1