L99LD20 datasheet(29/61 Pages) STMICROELECTRONICS

No de pièce	L99LD20

Description	High power LED driver for automotive applications

PDF	61 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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29 / 61 page

DS11366 Rev 3

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L99LD20

SPI functional description

CR#4: Control Register 4

Address:

0x04h

Type:

R/W

3÷2

B_IN_W2

Buck Input Voltage Window for Buck2 (see Table 19)

Reserved

This bit must be set to 1

Parity bit

ODD parity bit check

Table 15. CR#3: Control Register 3 (continued)

Bit

Default

Name

Description

9876

543210

Reserved

Unused

Table 16. CR#4: Control Register 4

Bit

Default

Name

Description

WD_TRIG

In order to keep device in Active mode, this bit must be cyclically

toggled within a period equal to tWD to refresh the watchdog.

22÷21

Reserved

Note: when writing on this register, bit 21 and 22 must be set to 00

20÷1

Unused

Parity bit

ODD parity bit check

Table 17. Constant VLED x TOFF selection

VLED_TOFF

Constant VLED x TOFF [V x µs]

0000

0001

0010

0011

0100

0101

0110

0111

1000

1001

1010

1011

1100

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