6.34.2 Status Register (SREG) and Boolean Formula
| I | T | H | S | V | N | Z | C |
| – | – | – | ⇔ | 0 | ⇔ | ⇔ | – |
- S
- N ⊕ V, for signed tests.
- V
-
0
Cleared.
- N
-
R7
Set if MSB of the result is set; cleared otherwise.
- Z
-
R7 ∧ R6 ∧ R5 ∧ R4 ∧ R3 ∧ R2 ∧ R1 ∧ R0
Set if the result is
0x00; cleared otherwise.
R (Result) equals Rd after the operation.
Example:
cbr r16,0xF0 ; Clear upper nibble of r16
cbr r18,1 ; Clear bit 0 in r18- Words
- 1 (2 bytes)
| Name | Cycles |
|---|---|
| AVRe | 1 |
| AVRxm | 1 |
| AVRxt | 1 |
| AVRrc | 1 |