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NXP Semiconductors
2.5 MCU interface
2.5.1 CAN TXD/RXD and SPI connections (UJA1164A/68AF/68AXF-EVB)
UM11379
User manual
The digital interface pins are located on the top side header J3 (J3-01 to J3-06), 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 pins are used for communication with
the MCU, either as SPI signals (see
(see
Table
11).
For variants with an SPI interface (UJA1164A, UJA1168A), integrated Multiple Time
Programmable Non-Volatile (MTPNV) memory cells allow the device to reload previously
configured settings at power up. The device boots up in Forced Normal mode when not
previously configured. Factory preset values can be restored if certain conditions are
met.
Detailed information on the functionality and operation of the UJA1164A and UJA1168A
can be found in the data sheets and application hints (see
Table 10. TXD, RXD and SPI connections
UJA1164A, UJA1168A
TXD (pin 1)
RXD (pin 4)
SDO (pin 6)
SDI (pin 11)
SCK (pin 8)
SCSN (pin 14)
Figure 9. MCU interface
All information provided in this document is subject to legal disclaimers.
Table
10) or as simple control and status signals
UJA1164A-EVB, UJA1168AF-EVB, UJA1168AXF-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(p1)
RXD(p4)
SDO(p6)
UJA1164A
SDI(p11)
UJA1168A
SCK(p8)
SCSN(p14)
Rev. 1 — 23 April 2021
UM11379
UJA116xA evaluation boards
Section
7).
J4
TXD
RXD
SDO
SDI
SCK
SCSN
J3
aaa-040312
© NXP B.V. 2021. All rights reserved.
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