bclr,   cbi,   cbr,   clc,   clh,   cli,   cln,   clr,   cls,   clt,   clv,   clz,

bclr, ( Rd --)

Bit Clear in SREG.

Clears a single Flag in SREG.

cbi, ( P b --)

Clear Bit in I/O Register.

Clears a specified bit in an I/O register. This instruction operates on the lower 32 I/O registers – addresses 0-31.

cbr, ( Rd k --)

Clear Bits in Register.

Clears the specified bits in register Rd. Performs the logical AND between the contents of register Rd and the complement of the constant mask K. The result will be placed in register Rd.

clc, ( --)

Clear Carry Flag.

Clears the Carry Flag (C) in SREG (Status Register).

clh, ( --)

Clear Half Carry Flag.

Clears the Half Carry Flag (H) in SREG (Status Register).

cli, ( --)

Clear Global Interrupt Flag.

Clears the Global Interrupt Flag (I) in SREG (Status Register). The interrupts will be immediately disabled. No interrupt will be executed after the CLI instruction, even if it occurs simultaneously with the CLI instruction.

cln, ( --)

Clear Negative Flag.

Clears the Negative Flag (N) in SREG (Status Register).

clr, ( Rd --)

Clear Register.

Clears a register. This instruction performs an Exclusive OR between a register and itself. This will clear all bits in the register.

cls, ( --)

Clear Signed Flag.

Clears the Signed Flag (S) in SREG (Status Register).

clt, ( --)

Clear T Flag.

Clears the T Flag in SREG (Status Register).

clv, ( --)

Clear Overflow Flag.

Clears the Overflow Flag (V) in SREG (Status Register).

clz, ( --)

Clear Zero Flag.

Clears the Zero Flag (Z) in SREG (Status Register).