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16-bit Proprietary F
2
MC-16F Family
Addressing and Super-accumulator
■ Main Addressing Modes (Can be used by transfer and arithmetic)
• Bit addressing
Direct bit: I/O area (2Kbits) + area inside DPR page (2Kbits)
Any bit within 64Kbytes may be specified.
• Indirect addressing
@RWi, @RWi+, @RWi+disp16, @RLi+disp8, @RWj+disp8 (i = 0 to 3), (j = 0 to 7)
@RW0+RW7
@RW1+RW7
@PC+disp16
@A
@SP+disp8
• Direct addressing
R0 to R7, RW0 to RW7, RL0 to RL3
dir, addr16, io, addr24
■ Super Accumulator
• 32-bit accumulator using AH:AL (16 bits:16 bits) as a pair.
• Data precision verification function
• Data keep function (available for data types of 16-bit word length and less)
00F8
FFF8
For example, a MOV instruction
MOVX instruction
F8
F8
Zero extension
Sign extension
X a
a b
a a+b
AH AL
MOV A,#b
ADDW A
↓
↓
F
2
MC-16F Family