ST6220LD3/SWD データシートの表示（PDF） - STMicroelectronics

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ST6220LD3/SWD

8-BIT MCUs WITH A/D CONVERTER, TWO TIMERS, OSCILLATOR SAFEGUARD & SAFE RESET

STMicroelectronics 

ST6208C/ST6209C/ST6210C/ST6220C

10.3 INSTRUCTION SET

The ST6 offers a set of 40 basic instructions

which, when combined with nine addressing

modes, yield 244 usable opcodes. They can be di-

vided into six different types: load/store, arithme-

tic/logic, conditional branch, control instructions,

jump/call, and bit manipulation. The following par-

agraphs describe the different types.

All the instructions belonging to a given type are

presented in individual tables.

Table 17. Load & Store Instructions

Instruction

LD A, X

LD A, Y

LD A, V

LD A, W

LD X, A

LD Y, A

LD V, A

LD W, A

LD A, rr

LD rr, A

LD A, (X)

LD A, (Y)

LD (X), A

LD (Y), A

LDI A, #N

LDI rr, #N

Addressing Mode

Short Direct

Short Direct

Short Direct

Short Direct

Short Direct

Short Direct

Short Direct

Short Direct

Direct

Direct

Indirect

Indirect

Indirect

Indirect

Immediate

Immediate

Legend:

X, Y Index Registers,

V, W Short Direct Registers

# Immediate data (stored in ROM memory)

rr Data space register

∆ Affected

* Not Affected

Load & Store. These instructions use one, two or

three bytes depending on the addressing mode.

For LOAD, one operand is the Accumulator and

the other operand is obtained from data memory

using one of the addressing modes.

For Load Immediate, one operand can be any of

the 256 data space bytes while the other is always

immediate data.

Bytes

1

1

1

1

1

1

1

1

2

2

1

1

1

1

2

3

Cycles

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

Fl ags

Z

C

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

*

*

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