Destination (and source) register in the Register File
Rr:
Source register in the Register File
R:
Result after instruction is executed
K:
Constant data
k:
Constant address
b:
Bit position (0..7) in the Register File or I/O Register
s:
Bit position (0..7)in the Status Register
X,Y,Z:
Indirect Address Register (X=R27:R26, Y=R29:R28, and Z=R31:R30 or
X=RAMPX:R27:R26, Y=RAMPY:R29:R28, and Z=RAMPZ:R31:R30 if the memory is larger than
64 KB)
A:
I/O memory address
q:
Displacement for direct addressing
UU
Unsigned × Unsigned operands
SS
Signed × Signed operands
SU
Signed × Unsigned operands
Memory Space Identifiers
DS( )
Represents a pointer to address in data space
PS( )
Represents a pointer to address in program space
I/O(A)
I/O space address A
I/O(A,b)
Bit position b of the byte in I/O space address A
Rd(n)
Bit n in register Rd
Operator
×
Arithmetic multiplication
+
Arithmetic addition
-
Arithmetic subtraction
∧
Logical AND
∨
Logical OR
⊕
Logical XOR
>>
Shift right
<<
Shift left
==
Comparison
←
Assignment
↔
Swap
x
Logical complement of x (NOT x)
Stack
STACK
Stack for return address and pushed registers
SP
The Stack Pointer
Flags
⇔
Flag affected by instruction
0
Flag cleared by instruction
1
Flag set by instruction
-
Flag not affected by instruction
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
