ST6201CM-Auto datasheet(55/96 Pages) STMICROELECTRONICS

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INSTRUCTION SET (Cont’d)

Conditional Branch. Branch instructions perform

a branch in the program when the selected condi-

tion is met.

Bit Manipulation Instructions. These instruc-

tions can handle any bit in Data space memory.

One group either sets or clears. The other group

(see Conditional Branch) performs the bit test

branch operations.

Control Instructions. Control instructions control

microcontroller operations during program execu-

tion.

Jump and Call. These two instructions are used

to perform long (12-bit) jumps or subroutine calls

to any location in the whole program space.

Table 17. Conditional Branch Instructions

Notes

3-bit address

Data space register

5 bit signed displacement in the range -15 to +16

∆

Affected. The tested bit is shifted into carry.

8 bit signed displacement in the range -126 to +129

Not Affected

Table 18. Bit Manipulation Instructions

Notes:

3-bit address

Not Affected

Data space register

Bit Manipulation Instructions should not be used on Port Data Registers and any registers with read only and/or write only bits (see I/O port

chapter)

Table 19. Control Instructions

Notes:

This instruction is deactivated and a WAIT is automatically executed instead of a STOP if the watchdog function is selected.

∆

Affected

*Not Affected

Table 20. Jump & Call Instructions

Notes:

abc 12-bit address

Not Affected

Instruction

Branch If

Bytes

Cycles

Flags

JRC e

C = 1

JRNC e

C = 0

JRZ e

Z = 1

JRNZ e

Z = 0

JRR b, rr, ee

Bit = 0

∆

JRS b, rr, ee

Bit = 1

∆

Instruction

Addressing Mode

Bytes

Cycles

Flags

SET b,rr

Bit Direct

RES b,rr

Bit Direct

Instruction

Addressing Mode

Bytes

Cycles

Flags

NOP

Inherent

RET

Inherent

RETI

Inherent

∆

STOP (1)

Inherent

WAIT

Inherent

Instruction

Addressing Mode

Bytes

Cycles

Flags

CALL abc

Extended

JP abc

Extended

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