17. BREAK – Break
17.1. Description
The BREAK instruction is used by the On-chip Debug system, and is normally not used in the application
software. When the BREAK instruction is executed, the AVR CPU is set in the Stopped Mode. This gives
the On-chip Debugger access to internal resources.
If any Lock bits are set, or either the JTAGEN or OCDEN Fuses are unprogrammed, the CPU will treat
the BREAK instruction as a NOP and will not enter the Stopped mode.
This instruction is not available in all devices. Refer to the device specific instruction set summary.
Operation:
(i) On-chip Debug system break.
Syntax: Operands: Program Counter:
(i) BREAK None PC ← PC + 1
16-bit Opcode:
1001 0101 1001 1000
17.2. Status Register (SREG) and Boolean Formula
I T H S V N Z C
– – – – – – – –
Words 1 (2 bytes)
Cycles 1
Atmel AVR Instruction Set Manual [OTHER]
Atmel-0856L-AVR-Instruction-Set-Manual_Other-11/2016
44
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