MDT2020FF Datasheet, PDF (7/16 Pages) Micon Design Technology Corporation – 8-bit micro-controller

8. Instruction Set
MDT2020(FF)
Instruction Code
Mnemonic
Operands
Function
Operating
Status
010000 00000000 NOP
No operation
None
010000 00000001 CLRWT
Clear Watchdog timer
0→WT
TF, PF
010000 00000010 SLEEP
Sleep mode
0→WT,stop OSC TF, PF
010000 00000011 TMODE
Load W to TMODE register W→TMODE
None
010000 00000100 RET
Return
Stack→PC
None
010000 00000rrr CPIO R
Control I/O port register
W→CPIO r
None
010001 1rrrrrrr STWR R Store W to register
W→R
None
011000 trrrrrrr
LDR R， t Load register
R→t
Z
111010 iiiiiiii
LDWI I
Load immediate to W
I→W
None
010111 trrrrrrr
SWAPR R，t Swap halves register
[R(0~3) ↔
R(4~7)]→t
None
011001 trrrrrrr
INCR R，t Increment register
R + 1→t
Z
011010 trrrrrrr
011011 trrrrrrr
INCRSZ R， Increment register，skip if
zero
ADDWR R，t Add W and register
R + 1→t
W + R→t
None
C，HC，Z
011100 trrrrrrr
SUBWR R，t Subtract W from register R ﹣W→t
C，HC，Z
(R+/W+1→t)
011101 trrrrrrr
DECR R，t Decrement register
R ﹣1→t
Z
011110 trrrrrrr
DECRSZ R，t Decrement register，
R ﹣1→t
None
skip if zero
010010 trrrrrrr
ANDWR R，t AND W and register
R ∩ W→t
Z
110100 iiiiiiii
ANDWI I
AND W and immediate
I ∩ W→W
Z
010011 trrrrrrr
IORWR R，t Inclu. OR W and register R ∪ W→t
Z
110101 iiiiiiii
IORWI I
Inclu. OR W and immediate I ∪ W→W
Z
010100 trrrrrrr
XORWR R，t Exclu. OR W and register R ♁ W→t
Z
110110 iiiiiiii
XORWI I
Exclu. OR W and immediate I ♁ W→W
Z
011111 trrrrrrr
COMR R， t Complement register
/R→t
Z
010110 trrrrrrr
RRR R，t
Rotate right register
R(n)→R(n-1)，
C
C→R(7) R(0)→C
010101 trrrrrrr
RLR R， t Rotate left register
R(n)→(n+1)，
C
C→R(0) R(7)→C
010000 1xxxxxxx CLRW
Clear working register
0→W
Z
010001 0rrrrrrr CLRR R Clear register
0→R
Z
0000bb brrrrrrr BCR R， b Bit clear
0→R(b)
None
0010bb brrrrrrr BSR R， b Bit set
1→R(b)
None
This specification are subject to be changed without notice. Any latest information please preview
http;//www.mdtic.com.tw
P. 6
2007/8 VER 1.5