ST6369 datasheet(50/71 Pages) STMICROELECTRONICS

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SOFTWARE DESCRIPTION (Continued)

Conditional Branch. The branch instructions

achieve a branch in the program when the sel ected

condition is met. See Tabl e 14.

Bit Manipulation Instructions.

These instruc-

tions can handl e any bit in data space memory.

One group either sets or cl ears. The other group

(see Conditional Branch) performs the bit test

branch operations.See Tabl e 15.

Control Instructions. The control instructions

control the MCU operations during program exe-

cution. See Tabl e 16-

Jump and Call. These two instructions are used to

perform l ong (12-bit) jumps or subroutines cal l

inside the whol e program space. Refer to Tabl e

17.

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

∆

Notes:

3-bit address

rr.

Data space register

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

∆

. Affected

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

* .

Not Affected

Table 14. Conditional Branch Instructions

Instruction

Addressing

Mode

Bytes

Cycles

Flags

SET b,rr

Bit Direct

RES b,rr

Bit Direct

Notes:

3-bit address;

* . Not Affected

rr.

Data space register;

Table 15. Bit Manipulation Instructions

Instruction

Addressing

Mode

Bytes

Cycles

Flags

NOP

Inherent

RET

Inherent

RETI

Inherent

∆∆

STOP (1)

Inherent

WAIT

Inherent

Notes:

This instruction is deactivated and a WAITis automatically executed instead of a STOP if the hardware activated

watchdog function is selected.

∆ . Affected

* . Not Affected

Table 16. Control Instructions

Instruction

Addressing

Mode

Bytes

Cycles

Flags

CALL abc

Extended

JP abc

Extended

Notes:

abc.12-bit address;

* . Not Affected

Table 17. Jump & Call Instructions

ST6369

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