AVR Instruction Set Nomenclature: Status Register (SREG ...
AVR Instruction Set Nomenclature: Status Register (SREG ...
AVR Instruction Set Nomenclature: Status Register (SREG ...
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SEN - <strong>Set</strong> Negative Flag<br />
Description:<br />
<strong>Set</strong>s the Negative flag (N) in <strong>SREG</strong> (status register).<br />
Operation:<br />
(i) N ← 1<br />
Syntax: Operands: Program Counter:<br />
(i) SEN None PC ← PC + 1<br />
16-bit Opcode:<br />
<strong>Status</strong> <strong>Register</strong> (<strong>SREG</strong>) and Boolean Formula:<br />
N: 1<br />
Negative flag set<br />
Example:<br />
1001 0100 0010 1000<br />
I T H S V N Z C<br />
- - - - - 1 - -<br />
Words: 1 (2 bytes)<br />
Cycles: 1<br />
add r2,r19 ; Add r19 to r2<br />
sen ; <strong>Set</strong> negative flag<br />
<strong>Instruction</strong> <strong>Set</strong><br />
113