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Bit proprietary f, Mc-16f family, Super accumulator – FUJITSU Semiconductor User Manual

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141

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

Fam

ily