FS23 datasheet(73/230 Pages) NXP

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NXP Semiconductors

FS23

Safety system basis chip (SBC) with power management, CAN FD and LIN transceivers

18.2.1.3 LIN Wake-up

A LIN wake-up event is detected when a low level on LIN bus is detected for at least TLIN_DOM_WU and is

followed by a rising edge.

aaa-051462

Dominant

LIN bus

LIN Wake up

TLIN_DOM_WU

LINRXD

Figure 41. LIN wake-up timing diagram

18.2.1.4 LIN Listen-only mode

The LIN transceiver Listen-only mode is entered from Wake capable mode when LIN mode is set to 2b’01

or when LIN mode is set to 2b’10 or 2b’11 and LINTXD is low (bus dominant). The device must be in Normal

mode.

The low-power wake-up receiver and the transmitter are disabled. Only the normal receiver is enabled. The

device is only able to report the bus level to the LINRXD pin. The device is not able to transmit information from

LINTXD to the bus.

18.2.1.5 LIN Active mode

The LIN transceiver Active mode is entered from Wake-capable or Listen-only mode when LIN mode is set to

2b’10 or 2b’11 and LINTXD is high. The device must be in Normal mode.

In Active mode, the normal receiver and the transmitter are enabled, and the low-power receiver is disabled.

The device can transmit information from LINTXD to the LIN bus and report the bus level to the LINRXD pin.

In this mode, the slope control feature is available by setting LIN_SLOPE to 2b’10, in order to reduce

electromagnetic emissions.

When a TSD or a LIN dominant timeout or a short circuit is detected, the transceiver goes back to Listen-only

mode and the transmitter is disabled. After a short circuit or a dominant timeout, the transmitter is enabled again

by a rising edge on LINTXD pin.

FS23

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Product data sheet

Rev. 7.0 — 16 October 2024

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