Zilog Z8F0130 - Manual (Page 133)

eZ8
™
CPU Core
User Manual
UM012820-0810 CLR Instruction
118
Escaped Mode Addressing
Using Escaped Mode Addressing, address modes R or IR can specify 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
Using Escaped Mode Addressing, if Working Register R6 contains AFh ,
the following statement leaves the value 00h in Working Register R6:
CLR R6

Object Code: B0 E6
If Register A5h contains the value 23h , and Register 23h contains the
value FCh , the following statement leaves the value 00h in Register 23h :
CLR @A5h

Object Code: B1 A5