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<strong>eZ80</strong> <strong>CPU</strong><br />
User Manual<br />
25<br />
CALL cc, Mmn<br />
Conditional CALL Subroutine<br />
Operation<br />
Description<br />
If cc True:<br />
(SP) ← PC<br />
PC ← Mmn<br />
If condition cc is true, the return address, which follows this instruction, is<br />
pushed onto the stack and then the program counter is loaded with the Mmn<br />
operand and execution continues at the new PC address. The Mmn operand is<br />
a 16- or 24-bit address, depending on the instruction and/or the ADL mode. The<br />
low-order byte of the mn operand is the first byte after the Op Code.<br />
ADL Prefix Operation<br />
0 None Stack 2-byte logical return address using SPS mapped by MBASE.<br />
Keep ADL cleared to 0. Load a 2-byte logical address from the<br />
instruction into PC.<br />
1 None Stack 3-byte return address using SPL. Keep ADL set to 1. Load a<br />
3-byte logical address from the instruction into PC.<br />
0 .IS Stack 2-byte logical return address using SPS mapped by MBASE.<br />
Stack a 00 byte using SPL. Keep ADL cleared to 0. Load a 2-byte logical<br />
address from the instruction into PC.<br />
1 .IS Stack two LS bytes of the return address using SPS mapped by MBASE.<br />
Stack the MS byte of the return address using SPL. Stack a 01 byte<br />
using SPL. Clear ADL to 0. Load a 2-byte logical address from the<br />
instruction into PC.<br />
0 .IL Stack 2-byte logical return address using SPL. Stack a 00 byte using<br />
SPL. Set ADL to 1. Load a 3-byte address from the instruction into PC.<br />
1 .IL Stack 3-byte return address using SPL. Stack a 01 byte using SPL.<br />
Keep ADL set to 1. Load a 3-byte address from the instruction into PC.<br />
UM007701-1100
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