Zilog Z8F0130 - Manual (Page 127)

eZ8
™
CPU Core
User Manual
UM012820-0810 CALL Instruction
112
CALL
Definition
CALL procedure.
Syntax
CALL dst
Operation
SP
 SP – 2
@SP
 PC
PC
 dst
Description
The Stack Pointer decrements by two, the current contents of the Program
Counter, which is the address of the first instruction following the CALL
instruction, are pushed onto the top of the stack and the specified destina-
tion address is then loaded into the Program Counter. The Program Coun-
ter now points to the first instruction of the procedure.
At the end of the procedure, a RET instruction returns to the original pro-
gram flow. RET pops the top of the stack and replaces the original value
into the Program Counter.
Flags
C Unaffected
Z Unaffected
S Unaffected
V Unaffected
D Unaffected
H Unaffected