L99PM72PXP datasheet(36/128 Pages) STMICROELECTRONICS

Part #	L99PM72PXP

Description	Advanced power management system IC with embedded LIN and high speed CAN transceiver supporting CAN Partial Networking

PDF	128 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Detailed description

L99PM72PXP

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Doc ID 023553 Rev 3

Figure 20.

CAN transceiver state diagram if selective wake-up is enabled (CR16 SW_EN = 1)

TRX Normal Mode

Full functionality of the CAN-Transceiver is available (transmitter and receiver) and the bus

biasing is enabled.

State transitions from 'TRX Normal' mode to 'VBat_standby' and 'V1_standby' are possible. No

interrupt is generated in this mode.

CAN TRX_STBY Mode

The CAN-Transmitter is disabled in this mode and the RxDC-pin is kept at high ('recessive')

level.

If selective wake-up is enabled (SW_EN=1), the receiver, CAN biasing and the reference

oscillator are active. Once a wake up frame (WUF) is detected by the internal CAN frame

detection logic, this wake-up event is indicated to the micro-controller by an interrupt signal

(see Section 2.2.5: Interrupt for more details). A wake-up pattern (WUP) is not required and

does not count as a frame error.

Since a further CAN-timeout cannot be indicated, if the CAN_TO bit has already been set, it

is recommended to clear this bit before entering V1_standby Mode.

If selective wake-up is disabled (SW_EN = 0), the CAN-Receiver is capable to detect a

wake-up pattern (WUP). In V1_standby Mode and Active Mode, a WUP is indicated to the

micro-controller by an interrupt signal (see Section 2.2.5: Interrupt for more details). In this

L99PM72PXP Datasheet(PDF) 36 Page - STMicroelectronics