NXP Semiconductors
S32K344
White Board
8.3 Communication interfaces
8.3.1 Ethernet interfaces
The ethernet switch SJA1105 is used and 4 ethernet interfaces are available on the
board. One of them is 100BASE-TX which can be connected to PC for diagnostics
and test. The other three interfaces are automotive ethernet (100BASE-T1). To meet
SJA1105 current consumption requirements, a 3.3V buck circuit from FS56 and a 1.2V
LDO is used to supply this device.
Figure 13. Ethernet circuit block diagram
Figure 14. Ethernet circuit on the White Board
8.3.2 CAN and LIN interfaces
There are 4 CAN interfaces on this board. The CAN phy TJA1145 is powered from
VBAT 12V and can work in sleep mode with only VBAT kept on. External specified CAN
UM11919 All information provided in this document is subject to legal disclaimers. © 2023 NXP B.V. All rights reserved.
User manual Rev. 1.0 — 11 April 2023
COMPANY PUBLIC 19 / 32
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