45181 Parallax Inc, 45181 Datasheet - Page 71

• Manufacturer Part Number: 45181
• Description: SX TECH TOOL KIT NO POWER
• Manufacturer: Parallax Inc
• Series: SXr
• Type: Microcontrollerr

Specifications of 45181

• Contents: SX Book, SX Key, SX Tech Board, Samples, Resonators, Cable and Manual
• Product: Microcontroller Basic Stamps
• Operating Supply Voltage: 5 V
• For Use With/related Products: SX MCUs
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

All expressions are evaluated at assemble-time only; they are never reevaluated during run-time. This
means symbols for unknowns, such as registers (which change at runtime), can not be included inside
expressions.
All constants and symbols within expressions may be 32-bit numbers and the result of the
expression is a 32-bit number. Since the SX is only an 8-bit processor, care must be taken to extract
the appropriate portion of the result for any particular operation. Table 11 – Unary Operators and
Table
sions.
Expressions are evaluated strictly from left-to-right, except when parentheses are present. The following
code demonstrates some simple expression usage.
12
– Binary Operators describe the available unary and binary operators for use within expres-
loop_count
table
mov
equ 5*3
ds
loop_count+10/5, #%01101
5+(2*3)
Symbol
Symbol
Table 12 - Binary Operators
Table 11 - Unary Operators
||
//
<<
>>
><
( )
&
~
\
+
/
|
^
*
-
-
.
Unary Operation
Binary Operation
Absolute value
Negative
Not
Macro assignment
Addition
Subtraction
Multiplication
Division
Modulus
Logical AND
Logical OR
Logical XOR
Shift left
Shift right
Reverse bits
Bit address
Sub-expression
SX-Key/Blitz Development System Manual 2.0 Parallax, Inc. Page 71
7 The SASM Assembler