L9963E datasheet(90/184 Pages) STMICROELECTRONICS

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Figure 25. Example of routine execution in normal mode

During a TCYCLE, the DUTY_ON flag is set when the routine is in the active phase (during TROUTINE), while it

is reset during the remaining idle time. It reflects the duty-cycle of the cyclic routine:

DUTY_ON flag duty-cycle during a cyclic execution

DUTY_ONℎigℎ%=TROUTINE

TCYCLE ×100

(15)

Programming a TROUTINE longer than TCYCLE is not recommended. Routine will behave in continuous mode,

even if not explicitly set.

In order to program a continuous execution the user must set CYCLIC_CONTINUOUS = 1 before enabling the

cyclic mode (CONF_CYCLIC_EN = 1).

Table 58. Focus on routine enable/disable and continuous mode activation/deactivation

CONF_CYCLIC_EN CYCLIC_CONTINUOUS

Effect on routine

1 → 0

Any ongoing routine is disabled once the active phase of the current cycle is

completed (DUTY_ON 1 → 0). Setting-Resetting CONF_CYCLIC_EN while

DUTY_ON = 1 is considered as a glitch and will be discarded. Refer to

Figure 25.

1 → 0

The routine is disabled after the last enabled step of the cycle has been

executed (upon TROUTINE completion).

0 → 1

Routine is started with TCYCLE periodicity.

0 → 1

Routine is started in continuous mode. NCYCLE started.

Changing CYCLIC_CONTINUOUS while the routine is disabled has no

effect.

While in continuous mode, TCYCLE is ignored and the periodicity will be given by TROUTINE. NCYCLE will be

incremented upon each routine completion (every TROUTINE).

The following table lists sampling intervals for the configuration parameters related to the cyclic functionality. It

is useful to understand when the new settings will be applied after they have been modified during an on-going

activity.

L9963E

Voltage conversion routine

DS13636 - Rev 12

page 90/184

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