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NXP Semiconductors
2.6 MCU interface
UM11758
User manual
The digital interface pins are located on the top side connector J3, as well as on the
bottom side connector J4. Two of these pins, TXD and RXD, are used for CAN data
communication with the MCU. The remaining four pins are used for SPI communication
with the MCU.
A bidirectional reset signal (connected to the RSTN pin on the UJA1169A) is also
accessible on J3 and J5.
Table 9. TXD, RXD and SPI connections
UJA1169A
TXD (pin 2)
RXD (pin 7)
SDO (pin 9)
SDI (pin 3)
SCK (pin 10)
SCSN (pin 20)
Figure 13. MCU interface
All information provided in this document is subject to legal disclaimers.
UJA1169Ax-EVB
J3-01 or J4-18
J3-02 or J4-20
J3-03 or J4-09
J3-04 or J4-07
J3-05 or J4-11
J3-06 or J4-05
TXD(p2)
RXD(p7)
SDO(p9)
UJA1169A
SDI(p3)
SCK(p10)
SCSN(p20)
Rev. 1 — 19 April 2022
UM11758
UJA1169A evaluation boards
J4
TXD
RXD
SDO
SDI
SCK
SCSN
J3
aaa-045565
© NXP B.V. 2022. All rights reserved.
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