Ground Connections; Power Supply Connections; Battery Connections - NXP Semiconductors UJA1169A User Manual

NXP Semiconductors

2.1 Ground connections

2.2 Power supply connections

2.2.1 Battery connections

UM11758
User manual
All ground pins are connected to the ground plane.
Table 2. Ground connections
Ground connections
J2-02
J3-07/12
J4-13
J5-11/13
J6-02/03
J9-02
An external power supply must be connected to either power jack J6 or 2-pin header J2,
as illustrated in Figure
Table 3. BAT/VIN connections
UJA1169A
BAT (pin 14)
Both supply circuits are routed via polarity protection Schottky diode D1 in order to block
reverse currents. Decoupling capacitors C1 and C2 are provided to stabilize the input
voltage and remove noise on the battery connection.
Green LED D2 lights up once the 12 V power supply has been connected.
By default, the UJA1169Ax-EVB evaluation board battery supply is routed to the MCU
board via pin VIN on the Arduino connector, allowing the supply to the entire module to
be managed via the UJA1169Ax-EVB board. This feature can be disabled by removing
jumper J8, disconnecting the battery supply from pin VIN.
All information provided in this document is subject to legal disclaimers.
2.
UJA1169Ax-EVB
J2-01 or J6-01: connect to 12 V battery supply; pin BAT on the device is
connected via Schottky diode D1.
J5-01 and J5-15: pin VIN on the UJA1169Ax-EVB board is connected,
by default, to the battery supply via jumper J8; remove jumper J8 to
disconnect VIN on J5 from the battery supply.
Rev. 1 — 19 April 2022
UM11758
UJA1169A evaluation boards
© NXP B.V. 2022. All rights reserved.
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