MFS2401AVBA0ES datasheet(55/151 Pages) NXP

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NXP Semiconductors

FS2400

Fail-safe system basis chip with SMPS and LDO, CAN FD transceiver

aaa-046852

CAN_OFF

CAN_WAKE_

CAPABLE

CAN_LISTEN

_ONLY

CAN_ACTIVE

CAN_EN_OTP &

(CAN_MODE != 00 or

CAN_WUEN != 00)

V3_UV = 1 or

CAN_MODE = 00 or

FS24_MODE != NORMAL

V3_UV = 1 or

CAN_MODE = 00 or

FS24_MODE != NORMAL

V3_UV = 0

& (CANTXD = 1

& CAN_MODE = 1x)

& FS24_MODE = NORMAL

& CAN_TSD = 0

V3_UV = 0

& (CAN_MODE = 01 or (CANTXD = 0 & CAN_MODE = 1x ))

& FS24_MODE = NORMAL

(CAN_MODE = 01 & FS24_MODE = NORMAL)

or CAN_TSD = 1

or CAN_TXD_TO = 1

From any state:

POR or CAN_EN_OTP = 0

or (CAN_MODE = 00 & CAN_WUEN = 00)

or (CAN_WUEN = 00 & FS24_MODE != NORMAL)

or (RSTB or LIMP0 asserted & CAN_FS_DIS = 0)

V3_UV = 0

& CANTXD = 1

& CAN_MODE = 1x

& FS24_MODE = NORMAL

Figure 35. CAN transceiver state machine

18.1.1.1 CAN off mode

When the CAN mode is set to 2b’00 and the CAN wake-up capability is disabled, or if the device is not in

Normal mode, for example in LPON or LPOFF modes, and the wake-up capability is disabled, the CAN

transceiver is in OFF mode. The CAN transceiver can also transition to OFF mode if RSTB or LIMP0 is asserted

and the MCU has set the CAN_FS_DIS bit to 0.

In this mode, the normal and low-power receivers and the transmitter of the CAN transceiver are disabled, the

CANH and CANL pins are set high ohmic, and the CANRXD pin is driven high.

18.1.1.2 CAN Wake-capable mode

The CAN transceiver is in Wake-capable mode as soon as the CAN mode is different from 2b’00 or as soon as

the wake-up capability of the CAN is enabled, regardless of the device state once powered up.

In this mode, the CAN transmitter and the CAN normal receiver are disabled. Only the low-power wake-capable

receiver is enabled to allow wake-up pattern detection and device wake-up. The CANH and CANL pins are

biased to ground via the common-mode input resistor RCAN_IN_CM and the CANRXD pin is driven high.

FS2400

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4 — 23 October 2024

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