why CAN SBC(UJA1169) need SPI communication?but LIN SBC(TJA1028)has no need SPI

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why CAN SBC(UJA1169) need SPI communication?but LIN SBC(TJA1028)has no need SPI

566 次查看
zhuohui
Contributor I

1.why CAN SBC(UJA1169/UJA107X) need SPI communication?
I want to know the role of SPI in the CAN SBC,because I found that such LIN SBC(TJA1028) without SPI.

 

2.Now my project want to cost down,when system no operate we want to made the system in sleep or standby mode,it is can only use TJA1042 & external LDO with wake function replace the UJA1169?

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540 次查看
zhuohui
Contributor I

thank you for your relpy,but I still want to know why CAN SBC such as UJA1169 need SPI,if I use TJA1042+LDO replace UJA1169,the CAN transceiver receive CAN L ,CAN H and then use uart communicate(RXD TXD) with the uC is enough,and the UJA1169 has  uart and SPI.so I don't understand why the role of SPI.

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guoweisun
NXP TechSupport
NXP TechSupport

1: SBC can provide the power supply and communicate with(SPI)  MCU, also has function of LIN/CAN  transceiver such as UJA1169.

TJA1028 is LIN transceiver + LDO

2:If you only need CAN  transceiver function you can select the TJA104X.

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