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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BRTS - Branch if the T Flag is <strong>Set</strong><br />
Description:<br />
Conditional relative branch. Tests the T flag and branches relatively to PC if T is set. This instruction branches relatively to<br />
PC in either direction (PC - 63 ≤ destination ≤ PC + 64). The parameter k is the offset from PC and is represented in two’s<br />
complement form. (Equivalent to instruction BRBS 6,k).<br />
Operation:<br />
(i) If T = 1 then PC ← PC + k + 1, else PC ← PC + 1<br />
Syntax: Operands: Program Counter:<br />
(i) BRTS k -64 ≤ k ≤ +63 PC ← PC + k + 1<br />
PC ← PC + 1, if condition is false<br />
34<br />
16-bit Opcode:<br />
<strong>Status</strong> <strong>Register</strong> (<strong>SREG</strong>) and Boolean Formulae:<br />
Example:<br />
1111 00kk kkkk k110<br />
I T H S V N Z C<br />
- - - - - - - -<br />
bst r3,5 ; Store bit 5 of r3 in T flag<br />
brts<br />
...<br />
tset ; Branch if this bit was set<br />
tset: nop ; Branch destination (do nothing)<br />
Words: 1 (2 bytes)<br />
Cycles: 1 if condition is false<br />
2 if condition is true<br />
<strong>Instruction</strong> <strong>Set</strong>