ST62P09CM3/XXX View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST62P09CM3/XXX

8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, OSCILLATOR SAFEGUARD, SAFE RESET AND 20 PINS

STMicroelectronics 

ST62T08C/T09C ST62T10C/T20C/E20C

5.3 INSTRUCTION SET

The ST6 core 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 14. Load & Store Instructions

Instruction

Addressing Mode

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

Short Direct

Short Direct

Short Direct

Short Direct

Short Direct

Short Direct

Short Direct

Short Direct

Direct

Direct

Indirect

Indirect

Indirect

Indirect

Immediate

Immediate

Notes:

X,Y. Indirect Register Pointers, 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 in relation with the addressing mode.

One operand is the Accumulator for LOAD 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

Flags

Z

C

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

∆

*

*

*

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