L99LD01 datasheet(41/69 Pages) STMICROELECTRONICS

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L99LD01

SPI functional description

3.6

Status registers

Status registers 1

Address:

0x04h

Type:

R/C

98765

43210

Reserved

Vs_Ov

Vs_Uv

Led_Oc Led_Ov

WD_fail

—

R(1)

R/C(2)

“Read only”, real time bit.

These bits are latched until a “Read and Clear” access.

Bit [15:13] Reserved

Bit [12] Lmode_Err: this bit is set if a mismatch between the signal on LMODE pin and VLED

pin is detected.

Bit [11] Vs_Ov: is set if an overvoltage event at the supply line is detected

Bit [10] Vs_Uv: is set if an under voltage event at the supply line is detected

Bit [9] Led_Temp_Warn: temperature warning for the LED

Bit [8] Led_Oc: Is set if an over current event across the LED chain is detected

Bit [7] Led_Ov: is set if an overvoltage event across the LED chain is detected

Bit [6] Vcc1_Off: when set, this bit indicated that VCC1 is off

Bit [5] Vcc1_Fail

Indicates that:

VCC1 is below VCC1_FAIL threshold for typ. 2 µs in active mode

VCC1 is below VCC1_FAIL threshold for more than 4 ms typ. during start up

Bit [4] Vcc1_Uv_To: this bit is set in active mode if VCC1 is below the reset threshold for more

than typ. 2 ms

Bit [3] Vcc1_Ot: set if an overtemperature condition has been detected on VCC1

Bit [2] Vcc1_Sc: indicates a short circuit on VCC1.

This bit is set if VCC1 stays below the VCC1_FAIL threshold 4 ms (typ.) after the power

on reset or below the reset threshold 100 ms after the POR (Power On Reset)

Bit [1] SDI_stuck@

Bit [0] WD_fail

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