L9965TS datasheet(41/62 Pages) STMICROELECTRONICS

Il numero della parte	L9965TS

Spiegazioni elettronici	Automotive SPI to isolated SPI transceiver

PDF	62 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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Figure 16. Wakeup by MCU

5.8.3

Special Frames

This section lists the special frames associated to specific events.

5.8.3.1

SPI FAULT/WAKEUP command

This command can be sent by MCU SPI writing the data 0xAE in CMD_REG to request L9965T/TS the

transmission of FAULT/WAKEUP tone to VIF chain.

Table 37. IC reaction to FAULT/WAKEUP frame

IC STATE

IC reaction upon frame receipt

NORMAL

•

FAULT/WAKEUP tone transmitted on the VIF to wake up all the devices on the chain

CYCLIC_WAKEUP

CYCLIC_COUNT

•

Device moves to NORMAL within TVIF_WAKEUP_TIME

•

The sender/listener states of the L9965T is latched in the WAKEUP_CYCLIC_TRX_SENDER

•

Or WAKEUP_CYCLIC_TRX_LISTENER bits in register GEN_STATUS2

•

GEN_STATUS2.WAKEUP_FAULT_SPI = 1

•

The frame is not decoded

DEEPSLEEP

•

Device moves to NORMAL within TVIF_WAKEUP_TIME

•

GEN_STATUS2.WAKEUP_FAULT_SPI = 1

•

The frame is not decoded

5.8.3.2

SPI WAKEUP command

Whatever frame sent by MCU SPI on both daisy-chain ends wakes up the L9965T/TS from a low power state

(see Section 5.1.1.1.2).

L9965T/L9965TS

Functional description

DS14987 - Rev 1

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