XA User Guide 6-106 4/17/98
JZ Jump if the A register is zero
Syntax: JZ rel8
Operation: (PC) <-- (PC) + 2
If (A) = 0 then
(PC.15-0) <-- (PC + rel8*2);
(PC.0) <-- 0
Description: A relative branch is taken if the contents of the 80C51 Accumulator are zero. The
branch range is +254 bytes to -256 bytes, with the limitation that the target address is word aligned
in code memory.
The contents of the accumulator remain unaffected. This instruction is included for 80C51
compatibility. See Chapter 9 for details of 80C51 compatibility features.
Note: Refer to section 6.3 for details of jump range
Size: Bit
Flags Updated: none
Bytes: 2
Clocks: 6t/3nt
Encoding:
1 1 1 0 1 1 0 0
rel8
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