L99LD02 datasheet(37/66 Pages) STMICROELECTRONICS

Teilenummer	L99LD02

Bauteilbeschribung	Automotive dual-phase boost DC/DC controller

PDF	66 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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37 / 66 page

DS12448 Rev 3

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L99LD02

Serial peripheral interface (ST SPI standard)

Table 22. CR#1: Control Register 1

Bit

Default

Name

Description

CTM_CLK_EN

CTM_CLK_EN can be set to 1 only if UNLOCK = 1; trying to

set this bit to 1 when UNLOCK = 0 will have no effects and it

will maintain its previous value.

CTM_CLK_EN can be reset to 0 also when UNLOCK = 0.

To set CTM_CLK_EN to 1, it is necessary to send two

consecutive SPI frames, as follows:

1st SPI write operation to set UNLOCK bit to 1 (CR#1, bit1)

2nd SPI write operation to set CTM_CLK_EN bit to 1

22÷2

Unused

UNLOCK

[0]: bits GOSTBY, EN and BST_DIS cannot be set to 1 but can

be reset;

[1]: bits GOSTBY, EN and BST_DIS can be set to 1, but only

with the next valid SPI frame.

When UNLOCK = 1, it will be automatically reset with the next

valid SPI frame.

Parity Bit

Odd Parity Bit Check

L99LD02 Datenblatt(PDF) 37 Page - STMicroelectronics