L9663 datasheet(24/106 Pages) STMICROELECTRONICS

Il numero della parte	L9663

Spiegazioni elettronici	Automotive PSI5 Transceiver IC

PDF	106 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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24 / 106 page

Power supply

L9663

24/106

DS11401 Rev 6

2.6

Reset handling

Four different sources are considered in resetting the IC:



POR (Power On Reset, see Section 2.1)



RESETN pin



SW_RESET



CKER_DETECT

All these sources of reset, when asserted, will switch off the PSIx lines and reset to default

value the device registers (including those registers for configuration).

Additionally to the hardware resets (by pin/POR), a reset can also be initiated by software

(SW_RESET).

The command SW_RESET initiates a soft reset-sequence if all of the following conditions

are fulfilled (see also the DCR register in SPI section):



unlocked state: it means that if the UNLOCK command is not received the command

SW_RESET has no effect;



The command SW_RESET is sent in the next SPI communication of the unlock

command.

A SW_RESET initiates soft reset-sequence and resets all digital parts of the device, except

POR and RST flag that is set in SR3 register.

L9663 Scheda tecnica(PDF) 24 Page - STMicroelectronics