45181 Parallax Inc, 45181 Datasheet - Page 142

• 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

13 Appendix C: SX Instruction Set
SUB
Operation: src is subtracted from dest. C will be cleared to 0 if an underflow occurred; otherwise, C will be set to 1.
SUBB
Operation: Subtracts src_bit from dest. If dest was decremented, Z will be set if the result was zero; else, Z will be
SWAP
Operation: The high- and low-order nibbles of dest are swapped. The MOV W,<>fr command is similar to SWAP
Page 142 SX-Key/Blitz Development System Manual 2.0 Parallax, Inc.
1) SUB
2) SUB
3) SUB
1) SUBB
1) SUBB
1) SWAP fr
Command
Command
Command
dest, src
fr, W
fr1, #literal
fr1, fr2
DC will be cleared to 0 if an underflow occurred in the least-significant nibble. Z will be set to 1 if the
result was 0; otherwise, Z will be cleared to 0. The MOV W, fr-W command is similar to #1, except the
result is moved to W, and fr keeps its original contents. If CARRYX is specified, c is added to the result.
Insert an STC before the first Sub on a register to avoid strange results.
dest, src_bit
fr, op.bit
fr, /op.bit
cleared. This instruction is useful for subtracting the carry from the upper byte of a double-byte value
after the lower byte has been subtracted.
dest
fr, except the result is moved to W, and fr keeps its original contents.
Words
Words
Words
1
2
2
2
2
1
Cycles
Cycles
Cycles
1 (4)
2 (8)
2 (8)
2 (8)
2 (8)
1 (4)
fr, W, C, DC, Z
fr, W, C, DC, Z
fr, C, DC, Z
Affects
Affects
Affects
fr, Z
fr, Z
fr
0000 101f ffff SUB fr, W
1100 kkkk kkkk MOV W, #lit
0000 101f ffff SUB fr, W
0010 000f ffff MOV W, fr
0000 101f ffff SUB fr, W
0110 bbbf ffff SNB op.bit
0000 111f ffff DEC fr
0111 bbbf ffff SB
0000 111f ffff DEC fr
0011 101f ffff SWAP fr
Subtract src_bit from dest
Subtract src from dest
Swap nibbles in dest
Coding
Coding
Coding
op.bit