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8XC251SA, SB, SP, SQ USER’S MANUAL
A-6
Table A-8. Data Instructions
Instruction Byte 0 Byte 1 Byte 2 Byte 3
Oper Rmd,Rms x C md ms
Oper WRjd,WRjs x D jd/2 js/2
Oper DRkd,DRks x F kd/4 ks/4
Oper Rm,#data x E m 0000 #data
Oper WRj,#data16 x E j/2 0100 #data (high) #data (low)
Oper DRk,#data16 x E k/4 1000 #data (high) #data (low)
MOV DRk(h),#data16
MOV DRk,#1data16
CMP DRk,#1data16
7
7
B
A
E
E
k/4 1100 #data (high) #data (low)
Oper Rm,dir8 x E m 0001 dir8 addr
Oper WRj,dir8 x E j/2 0101 dir8 addr
Oper DRk,dir8 x E k/4 1101 dir8 addr
Oper Rm,dir16 x E m 0011 dir16 addr (high) dir16 addr (low)
Oper WRj,dir16 x E j/2 0111 dir16 addr (high) dir16 addr (low)
Oper DRk,dir16 (1) x E k/4 1111 dir16 addr (high) dir16 addr (low)
Oper Rm,@WRj x E j/2 1001 m 00
Oper Rm,@DRk x E k/4 1011 m 00
NOTE:
1. For this instruction, the only valid operation is MOV.
Table A-9. High Nibble, Byte 0 of Data Instructions
x Operation Notes
2 ADD reg,op2
All addressing modes are
supported.
9 SUB reg,op2
B CMP reg,op2 (1)
4 ORL reg,op2 (2)
5 ANL reg,op2 (2)
6 XRL reg,op2 (2)
7 MOV reg,op2
8 DIV reg,op2 Two modes only:
reg,op2 = Rmd,Rms
reg,op2 = Wjd,Wjs
A MUL reg,op2
NOTES:
1. The CMP operation does not support DRk, direct16.
2. For the ORL, ANL, and XRL operations, neither reg nor op2
can be DRk.