L99LD01 datasheet(38/69 Pages) STMICROELECTRONICS

Teilenummer	L99LD01

Bauteilbeschribung	High efficiency constant current LED driver for automotive applications

PDF	69 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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38 / 69 page

SPI functional description

L99LD01

38/69

DocID025319 Rev 3

3.5

Control registers (RAM)

Control registers 1

Address:

0x01h

Type:

R/W

Reset:

0000 0000 0000 1110b

98765

43210

Reserved

Mux[[1:0]

En_Ntc

Bit [6:15] Reserved

Bit [5:4] Mux[1:0]:

00 (default): the signal on the PWM pin is reflected on Mout pin

01: the signal on the VLED is reflected on Mout pin

10: the signal on NTC is selected

11: the signal on Lmode pin is selected

Bit [3] Mux_En:

0: the Mout pin is inactive (tristate)

1: the Mout pin is active (default)

Bit [2] En_Ntc:

When set, the current fold back feature enabled in case of LED overtemperature

conditions.

This bit is ignored in case of any LIMP MODE and the LED temperature monitoring is

activated (the NTC control is internal)

Bit [1] WD_Period:

0: WD timeout = 100 ms

1: WD timeout = 200 ms (default)

Bit [0] WD_trig:

This bit must be toggled within the WD period to refresh the WD

L99LD01 Datenblatt(PDF) 38 Page - STMicroelectronics