STLUX datasheet(26/126 Pages) STMICROELECTRONICS

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Product overview

STLUX

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DocID027870 Rev 1

wakeup time is faster. The wakeup is triggered by the internal AWU interrupt, external

interrupt or reset.



Active halt mode with regulator off: this mode is the same as active halt with the

regulator on, except that the main voltage regulator is powered off, so the wakeup time

is slower.



Halt mode: in this mode the microcontroller uses the least power. The CPU and

peripheral clocks are stopped, while the main voltage regulator is switched in power-

off. Wakeup is triggered by an external event or reset.

In all modes the CPU and peripherals remain permanently powered on, the system clock is

applied only to selected modules. The RAM content is preserved and the brownout reset

circuit remains enabled.

5.7

Communication interfaces

5.7.1

Digital addressable lighting interface (DALI)

The DALI (digital addressable lighting interface), standardized as the IEC 62386, is the new

interface for lighting control solutions defined by the lighting industry.

The DALI protocol is generally implemented in a DALI communication module (DCM):

a serial communication circuit designed for controllable electronic ballasts. “Ballast” is

a device or circuit used to provide the required starting voltage and operating current for the

LED, fluorescent, mercury or other electronic-discharge lamps.

The STLUX DALI driver has the following characteristics:



Speed line:1.2, 2.4 and 4.8 kHz transmission rate ± 10%



Forward payload: 16, 17, 18 and 24-bit message length



Backward payload: 8-bit message length.



Bidirectional communications



Monitor receiver line timeout 500 ms ± 10%



Polarity insensitive on DALI_rx, DALI_tx signal line



Interoperability with different message length



Maskable interrupt request line



DALI peripheral clock has slowed down to 153.6 kHz in low speed operating mode



Improved DALI noise rejection filter on DALI_rx input line (see Section : DALI noise

rejection filter).

DALI noise rejection filter

The STLUX DALI interface includes a noise rejection filter interconnected on the RX

channel capable to remove any bounce, glitch or spurious pulse from the RX line. The filter

can be configured via three registers:



MSC_DALICKSEL: selects the source clock of filter timing



MSC_DALICKDIV: configures the clock prescaler value



MSC_DALICONF: configures the filter count and operating mode.

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