Zilog Z8F0130 - Manual (Page 213)

eZ8
™
CPU Core
User Manual
UM012820-0810 POP Instruction
198
Escaped Mode Addressing
Using Escaped Mode Addressing, address modes R or IR specifies a
working register. If the destination address is prefixed by
Eh ( 1110b ), a
working register is inferred. For example, if Working Register R12 ( Ch ) is
the preferred destination operand, use ECh as the destination operand in
the Op Code. To access registers with addresses E0h to EFh , either set the
Working Group Pointer, RP[7:4] , to Eh or use indirect addressing.
Sample Usage
If the Stack Pointer (control Registers FFEh and FFFh ) contains the value
70h and Register 70h contains the value 44h , the following statement
loads the value 44h into Register 34h . After the POP operation, the Stack
Pointer contains 71h :
POP 34h

Object Code: 50 34
The contents of Register 70h are not affected.
If the Stack Pointer (control Registers FFEh and FFFh ) contains the value
0080h , memory location 0080h contains the value 55h , and Working
Register R6 contains the value 22h , the following statement loads the
value 55h into Register 22h :
POP @R6

Object Code: 51 E6
After the POP operation, the Stack Pointer contains the value 0081h . The
contents of Working Register R6 are not affected.