AN4291 datasheet(35/53 Pages) STMICROELECTRONICS

35 / 53 page

DocID024519 Rev 1

35/53

AN4291

User interface

7.4.19

hl - ? - global help

It displays a list of all accepted commands.

Syntax:

•

Parameter: none

Output: the list of all accepted commands.

7.5

Error codes

The STLUX385A firmware performs several system checks during its execution. When an

error is found:

The red fault LED is triggered.

The error counter is incremented.

The error code is stored in an internal variable. The last error code is reported by the

status command ("st").

The fault LED can only be reset via the "co" command. The "co" command also clears the

error code. The error counter is never reset.

The following table describes the error codes:

Table 3. Error codes

Code

Mnemonic

Meaning

Action

ERR_NO_ERR

No error

N/A

ERR_PW

Power voltage under or upper the limit at power-on

Dimming OFF

ERR_MAX_F

PWM frequency is over the limit

N/A

ERR_MIN_F

PWM frequency is under the limit

N/A

ERR_FLASH

Error while writing in Flash

The last serial

command is not

stored into E

2PROM

ERR_OVC

Overcurrent protection (OCP). Preventing short-

circuit or overcurrent point

Dimming OFF

ERR_MAX_V

Main input voltage over the upper limit (50 V)

ERR_MIN_V

Main input voltage too low to drive the configured

number of LEDs.

N/A

ERR_MIN_L

Power voltage across the inductance lower the limit

(lower than 2.8 V)

Dimming OFF

ERR_MAX_L

LED voltage over the maximum.

N/A

ERR_MIN_D

Number of LEDs below the limit (< 3 LEDs)

N/A

ERR_VOL_L

LED voltage drop below the minimum

N/A

ERR_DALI

Failure on the DALI I/F – only when DALI FW is

enabled

DALI error

AN4291 Datasheet(PDF) 35 Page - STMicroelectronics

AN4291 Datasheet(HTML) 35 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

Datasheet Download

Link URL