AN3393 datasheet(50/103 Pages) STMICROELECTRONICS

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Operation codes

AN3393

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DocID018750 Rev 4

6.1.1

NOP (0h)

NOP (no operation) is used as filler for the NEXT/RESET pair for some particular conditions

which don’t need an active opposite condition.

–

If NOP is in RESET condition: do nothing and move to NEXT condition;

–

If NOP is in NEXT condition: do nothing and stay in the same state re-evaluating

the RESET condition when a new sample arrives;

–

If NOP opcode in NEXT condition is not real: use case;

–

No outputs.

6.1.2

TI1 (1h)

TI1 condition counts and evaluates the counter value of the TCy register.

If a new sample set (X, Y, Z, V) occurs, then TCy = TCy - 1:

–

If TCy > 0 (counter is not full): continue comparisons in the current state (wait for

new samples);

–

If TCy == 0 (counter is full): Timer TI1 condition (NEXT or RESET) is valid.

This condition affects or is affected by the following registers:

–

TIM1_y is 16 bits unsigned initial value;

–

PRy: Program and Reset pointer addresses.

6.1.3

TI2 (2h)

TI2 condition counts and evaluates the counter value of the TCy register.

If a new sample set (X,Y,Z,V) occurs, then TCy = TCy - 1:

–

If TCy > 0 (counter is not full): continue comparisons in the current state (wait for

new samples);

–

If TCy == 0 (counter is full): Timer TI2 condition (NEXT or RESET) is valid.

This condition affects or is affected by the following registers:

–

TIM2_y is 16 bits unsigned initial value;

–

PRy: Program and Reset pointer addresses.

6.1.4

TI3 (3h)

TI3 condition counts and evaluates the counter value of the TCy register.

LRTH1

Any/triggered axis less than or equal

to reversed THRS1

First axis triggers

GRTH2

Any/triggered axis greater than

reversed THRS2

First axis triggers

LRTH2

Any/triggered axis less than or equal

to reversed THRS2

First axis triggers

NZERO

Any axis zero crossed

First axis triggers

Table 83. Conditions (continued)

OP code

Mnemonic

Description

Note

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